A man ate 100 apples in the past five days. Each day he ate 6 more apples than the previous day. How many did he eat on the 4th day?

Riddle Answer# Logic Riddles

## Walk to Factory

A father and son work in the same factory. The father takes 30 minutes to walk to his factory and the son is able to cover the same distance in only 20 minutes. If the father were to leave the house 5 minutes earlier, how soon would his son catch up with his father?

Riddle Answer## 2 Equals 1 Proof

What is wrong with the following proof?

2=1

a = b

a^{2} = ab

a^{2} – b^{2} = ab – b^{2}

(a+b)(a-b) = b(a-b)

a + b = b

2b = b

2 = 1

## Two Water Lilies

Water lilies grow extremely rapidly. In one pond, a water lily grew so fast that each day it covered a surface area double that of the area it had covered the previous day. At the end of the 30th day, it had covered the pond entirely. How long do you think it will take for two such water lilies to cover the whole pond?

Riddle Answer## Half as Long until Midnight

If it were two hours later, it would be half as long until midnight as it would be if it were an hour later. What time is it now?

Riddle Answer