Riddle 1
• Youhave 8 balls of equal size. 7 of them weigh
the same, but one is heavier. You have a
balance scale. What is the minimum number
of weighings needed to find the heavier ball?
3.
Riddle 2
• Aman has to get a wolf, a goat, and a cabbage
across a river. His boat can carry only himself
and one other at a time. The wolf cannot be
left alone with the goat, and the goat cannot
be left with the cabbage. How does he do it?
4.
Riddle 3
• Acar travels 60 km at 30 km/h and another 60
km at 60 km/h. What is the average speed of
the car for the whole journey?
5.
Riddle 4
• Youare in a room with 3 light switches. In the
next room, there are 3 light bulbs (all off). You
may enter the room with bulbs only once.
How can you find out which switch controls
which bulb?
6.
Riddle 5
• Aman is looking at a person’s photograph. His
friend asks, “Who is it?” The man replies:
“Brothers and sisters, I have none. But this
man’s father is my father’s son.” Who is in the
picture?
7.
Riddle 6
• Iam a two-digit number. When you read me
from right to left, I get larger and the numbers
should be consecutive. When you add my
digits, the sum is 13. What number am I?
8.
Riddle 7
• Threeants are sitting at the corners of a
triangle. Each ant randomly chooses a
direction and starts walking along the edge.
What is the probability that none of them
collide?
9.
Riddle 8
• I’mtaken from a mine and shut up in a
wooden case, from which I am never released,
and yet I am used by almost everybody. What
am I?
10.
Riddle 9
• I’mlight as a feather, yet the strongest person
can’t hold me for five minutes. What am I?
11.
Riddle 10
• Youneed to measure exactly 4 liters of water
using only a 5-liter and a 3-liter jug. How do
you do it?
12.
Riddle 11
• Ihave cities, but no houses. I have mountains,
but no trees. I have water, but no fish. What
am I?
13.
Riddle 12
• Ihave a face but no eyes. I have hands but no
arms. I have a ticking sound but no heart. You
look at me to solve a problem involving time.
What am I?
14.
Riddle 13
• Ahave a bed but I never sleep. I have a mouth
but I never speak. What I am