Reader’s Digest International — August 2017

122 | August• 2017

TEST YOUR MENTAL PROWESS

Puzzles

BRAIN POWER

Challenge yourself by solving these puzzles and mind stretchers,

then check your answers on page 121.

BY MARCEL DANESI

THE HOLE THING (EASY)

Which of the four three-

dimensionalfigures on the

right would fit intact through

the square hole below?

THIRD GEAR (DIFFICULT)

Three of these gears have an arrow pointing

upwards. How many full turns of the crank

would it take to get all three back in the

same position?

60

TEETH

6 TEETH

12

TEETH

24

TEETH

16

TEETH

48

TEETH

6

4

4

4

4 4

1

4 .5

4 .5

4 .5

7 .5

1

1

3

8

5

5

A

CD

B