One of the members forming each of the following quintets is, for some reason or other, the black sheep of the set. Can you single out the fifth columnist that has infiltrated into each group? The intruder in the first quintet, for instrance, is CUBE, a solid among plane figures.
(a) Rhombus, trapezium, cube, triangle, pentagon.
(b) Ortega, Titicaca, Constance, Huron, Sargasso.
(c) Delft, Rotterdam, Amsterdam, Leyden, Potsdam.
(d) Pedometer, pluviometer, photometer, goniometer, tetrameter.
(e) Unicorn, wyvern, griffin, mustang, roc.
(f) Phidias, Scopas, Murillo, Praxiteles, Houdon.
(g) Moscow, Budapest, Bucharest, Vienna, Riga.
(h) Piccolo, bassoon, clarionet, oboe, ocarina.
(i) Beethoven, Grieg; Wagner, Weber, Meyerbeer.
(j) Pope, Keats, Masefield, Dryden, Milton.

157 - SKELETON MULTIPLICATION

7 - - - 5 6 - - - - 3 7 - 5    2 - - 6       3 - 1 5 - -

In the skeleton multiplication sum at the left each of two digits, has been replaced by a hyphen [-] whenever it occurred. Can you reconstruct the whole operation? There is one solution.

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158 - BUILDOGRAM

A-D-E-G-N-O-R-S-U Here is a new crossword game you can play alone or in groups. It consists in fitting the above nine letters into the puzzle diagram (one letter per square), making as many dictationary words "across" and "down" as possible. Abbreviations and foreign words not in common use are barred. When you have filled in all the letters, award yourself 3 points for every 3-letter word ("across" or "down") you get, and 2 points for words of two letters. Finally award yourself 4 points it you succeed in forming a 9-letter word with all the letters inalved. A score of 20 is excellent, 18 is very good and 17 or 16 good. What's your score?

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159 - HOUSE NUMBERS

The houses in Aristophanes Street have recently been recently renumbered from #1 upwards, at a cost of $45. The cost of each numeral was calculated as follows: #1 cost 1¢, #2 cost 2¢ etc. There was no charge for #0. Thus for instance, #293 cost 14¢ and #307, 10¢. How many houses are there in the street?

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160 - RUM-TAILED WORDS

We make use of quite a few words terminating in RUM, not necessarily Latin words like QUORUM, FORUM, DECORUM. Here are ten of them awaiting identification. How many of them can you spot?

__________ RUM		1. The RUM lasting five years.
__________ RUM		2. The RUM against which a lever is placed.
__________ RUM		3. The RUM that is a speaker's platform.
__________ RUM		4. The RUM that the ancient Egyptians used as a rattle.
__________ RUM		5. The RUM with which a zither is plucked.
__________ RUM		6. The dull sort of RUM.
__________ RUM		7. The puzzling RUM.
__________ RUM		8. The RUM that is a lily.
__________ RUM		9. The rainbow-like RUM.
__________ RUM		10. The RUM coming from the guitar.

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161 - WORD PYRAMID

Fill in the words suggested by the clues below, bearing in mind that each word after the top one is made up of the letters forming the letters immediately above it together with a new letter followed by a reshuffling (where necessary) of the letters. CLUES 1. An interjection. 2. A preposition. 3. Dartmoor peak. 4. Ran impetuously. 5. This circle is not close to the bull's eye. 6. Utterly defeated. 7. Roundabout routes. 8. Definitely a non-member. 9. Having two wings.

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162 -TAR WORDS

It is rather hard to come by words beginning with TAR. Here are clues to ten of them, with slashes [-] to indicate their length. Can you supply the missing letters and discover them? The first one for instance would read TARSIER

T A R - - - -.		1. The TAR that is a lemur.
T A R - - -.		2. The TAR with a single mast.
T A R - - - - -.		3. The TAR very much like a fez.
T A R - - - - -.		4. The TAR that is a kind of muslin.
T A R - - - - - -.		5. The TAR that is a vehicle used in Russia.
T A R - - - - - - -.		6. The TAR that is a dance.
T A R - - - - - -.		7. The TAR that is a spider.
T A R - - -.		8. The TAR that is a collection of bones.
T A R - - -.		9. The TAR found in the sea off the south coast of the U.S.A.
T A R - - - - - - -.		10. The TAR that moves about at a very slow pace.

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163 - DISFIGURED MULTIPLICATION

* * * * * * * * * * * * *      * * * *       * 3 * 8 4 *

In the long multiplication sum on the left, every 1, 7 and 9 has been suppressed and replaced by a *. As you can see only three figures have survived the ruthless censorship. Yet it is not impossible to deduce what each * stands for. Can you reconstruct the operation?

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164 - CHANGING MAMMALS

It is unthinkable to try to transform a mammal into another. But on paper it can be done in only five intervening stages, merely by changing one letter in a word at each step and without rearranging the letters. Thus, for instance, it is possible to change CARP into SOLE using only three intermediate words, thus, CARP, CARE, CORE, SORE, SOLE. Now have a shot at turning LORIS into CIVET

L O R I S - - - - - - - - - - - - - - - - - - - - C I V E T

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165 - RIGHT HALVES

Take three consecutive letters from eash word in the pairs below. Weld the two pieces and you will get the word suggested by the clue given in brackets against the pair. For example, the first word should be AMAZON --- drAMAtist, emblaZONs. Now try to discover the others.
1. DRAMATIST - EMBLAZONS (A great South American river)
2. GANGLIONS - DIGESTION (Another great river in Asia)
3. HUMILIATE - MILLSTONE (A great English poet)
4. HUSBANDRY - CONDENSED (Another great English poet)
5. FEATHERED - EXTENSIVE (A capital city in Eurepe)
6. EXTIRPATE - FANATICAL (Another European capital)
7. ASSISTANT - SHRINKING (A songbird)
8. CHORISTER - MOLECULAR (Another feathered friend)
9. CROSSWORD - DISCUSSED (A flower)
10. PANTOMIME - GOOSANDER (Another flower)

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166 - ROMAN CROSSWORDS

1 2 3 4 5       6       7

Here are clues to words each of which has four letters which are Roman numerals and which should be inserted in their respective places in the diagram. For instance, if the suggested word is MASCULINE, the letters M, C, L, and I would go into the panel. The figures in parentheses denote the number of letters in each word.

C L U ES
ACROSS
1. Evaporating with rapidity (8)
5. Flower in climates (8)
6. French (6)
7. One who disapproves of every doctrine. (8)
DOWN
1. A singer (8)
2. Sleep-promoting songs (9)
3. Likeness (6)
4. Calamity (10)

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167 - SEVEN ONES

After showing her brother how to multiply together two 3-digit numbers, Joan covered most of the digits with counters, leaving only the 1's unconcealed. On the left appears the whole operation. [Note that the letters on the counters serve no purpose other than to facilitate the explanation in the answer] Also note that ZERO is not involved. Your task of course is to unmask the hidden digits.

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168 - CENSORED WORDS

Each of the ten 10-letter words given below has been robbed of six of its letters - the six missing letters being the same for all ten words. • Moreover the six missing letters form a word. What are the original words?

1.		P - - - A - H - - D		2.		- - - O H - D - O -
3.		- - - R - L A - - Y		4.		L A - - - A - I - -
5.		I - - - - D U - - D		6.		- - - C - N - - I C
7.		- - U - T - - A C -		8.		P - - - - - T I O -
9.		A U - - I - - - E -		10.		- - N C - - - I - A

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169 - DISSECTION

Consider this diagram. Dissect it into five parts that can be pieced together to form two equal squares, but without resorting to more than three straight cuts. If you examine the dimensions of the figure carefully and find its area, your task will be immensely facilitated. Can you do it? [You may wish to cut a piece of cardboard to the dimensions and go to it hands on]

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170 - ROUNDWORDS

Here are clues to 15 words of six letters each of which should be filled in clockwise in the diagram round the numbered circles, each word beginning in the sector indicated by the respective pointer, with the rest of the letters occupying the remaining five sectors in order.

C L U E S 1. Great hunter in Genesis. 2. In abundance. 3. He has a grinding job. 4. It has attractive qualities. 5. Heavenly messengers. 6. South American steppes. 7. Conditions.

8. Ancient Rome's legislative assembly. 9. Musical composition. 10. The age of immaturity. 11. JAM SET (Anagram). 12. Ornament made up of loose threads. 13. A charm. 14. More than human, but benevolent. 15. Mohammed's flight from Mecca to Medina.

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171 - QUIZ BOX Which is the correct answer from the four given in each of these questions?

1. The coulomb is	(a) a unit of electricity (b) a million calories (c) Columbia's monetary unit (d) a French card game
2. Mauna Loa is an active volcano. Where is it located?	(a) Japan (b) Formosa (c) Hawaii (d) Madagascar
3. If a professional boxer tips the scales at l0 st. 6 lb., in which category would he be placed?	(a) featherweight (b) bantamweight (c) flyweight (d) welterweight
4. During the Second Great War, the Germans built a strong line of fortifications called the Mareth Line. Where?	(a) in Libya (b) north of Cassino (c) in Tunisia (d) in the Ardennes plateau
5. What would you use a goniometer for?	(a) to discover the wind's velocity (b) to measure angles (c) to find the specific gravity of a liquid (d) to determine the resistance of a given metal

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172 - MIDDLE ANAGRAM

ALTER | PAIRS | PHASE | SATIN | SEVER | TEARS Anagram the six words given above and insert the words you obtain in their rightful place in the panel, so as to form six common words of 9 letters. If yau find the correct words, the letters appearing down the middle column will form a word mode up of two identical halves. What is the middle word?

P L           E R A B           E D I N           L Y B I           A L U N           L Y C A           O N

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173 - CRYPTIC DIVISION E L) C E L R C O (P B O H I
L R
P H L
Y I B
P P R
P P P
P C O
P C 0
The long division sum on the left is based on a 10-letter keyword whose letters replace the digits 0, 1, 2, .......... 9, in that order. Work it out and find the keyword.

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174 - TICKLISH SQUARE

ABCD is a square piece of paper, 31 cm long. P Q R and S are points in AB, BC, CD, and DA, respectively. AP, BQ, CR, and DS, are all equal. The shaded triangles are folded inwards along PQ, QR, RS, and SP respectively, leaving only the centre square uncovered. What is the length of AP if the central square is 17 cm long? [AP is longer than AS]

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175 - SCULPTURE AND SCULTOR

Fill the words suggested by the clues below in the diagram on the left, beginning each word in the numbered circle and continuing it in order in the circles linked with it. The letters given will make your task somewhat easier. When you have finished, you will find that the letters in the outer frame of circles, reading clockwise from circle 1, will form the name of a famous piece of sculpture and its equally famous creator. 1. Methusaleh's father. 2. Goddess of rural economy in Classical Mythology. 3. A word having the same spelling as another but with a different meaning. 4. Forerunner of the Bundestag. 6. One of the best known of English diarists. 6. Wild dog of Asia and Africa. 7. Spanish river.

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176 - SPORTING SIX

Under the modest title of THE BOOK OF SPORTS AND GAMES, COLONEL I. CLINNY has included all one wishes to know about six very popular games and sports. Rearrange the letters on the cover and you will discover what the book treats so extensively in its pages.

THE BOOK OF SPORTS AND GAMES COLONEL I. CLINNY

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177 - 1 --- 2 --- X Test your General Knowledge in football pool fashion. If you think the "home" answer is correct, circle 1 in the results column, if you judge the "away" answer in correct, circle 2. If both answers are equally good, circle X.

MATCH	HOME	AWAY	RESULTS
1. Which is a Capital City?	Katmandu	Caracas	1 | 2 | X
2. Which is a stringed instrument?	Musette	Balalaika	1 | 2 | X
3. Which is a breed of dog?	Saluki	Samoyed	1 | 2 | X
4. Where is Lake Tititaca?	Bolivia	Peru	1 | 2 | X
5. Where is the newspaper, Borba, published?	Spain	Yugoslavia	1 | 2 | X
6. What was Nikolai's nationality?	Russian	German	1 | 2 | X
7. Who was assassinated?	Hippocrates	Caligula	1 | 2 | X
8 Which is a quadruped?	Foumart	Wapiti	1 | 2 | X
9. Whieh is a cannon?	Culverin	Falchion	1 | 2 | X
10. Which is a bone?	Carpus	Radius	1 | 2 | X

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179 - FUEL PROBLEM In the letter long division below, each of the digits from 1 to 9, as well as zero, occurs at least once. Your problem is of course, to solve the problem.

B O E M F U E L) P R O B L E M P F U B           S O U L         M L E O         L L B P E     L U F E E    L F O U M L F O U M

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180 - WORD SQUARE

C                 C

C - C - E - I - I - L - L - L O - O - O - P - P - S - S - Y Reconstruct the magic word square on the left employing only the 16 1etters given above. All four words in the square are in common use. To give you a flying start two key letters have been assigned their right places. Fill in the remainder.

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CHECK YOUR ANSWERS