John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

Decode below rebus
D
N
A
T
S , D

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

What has 88 keys?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.