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Rowing - logic puzzle
1
11
21
1211
111221
312211
13112221
What number comes in the next row?
11
21
1211
111221
312211
13112221
What number comes in the next row?
Billiard-balls - logic puzzle
|
Nine billiard-balls are lying in front of you. Except for one they all have the same weight. The exception is a little bit heavier than the others. What is the minimal number of times you have to use a balance in order to find the wrong billiard ball? |
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Letter math - math puzzle
A - B = B
B * C = A
D : B = E
C * C = E
C + E = A
For which numbers stand A, B, C, D and E?
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