If 21x = 79x, what is the value of x?

How many times do a clock's hands overlap in a day ?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

Can you find the hidden animal in the picture below?

A king sentenced a man to the death sentence for some crime he had committed. Known for his kindness, the king told the culprit that he had a choice to die in a way he decides.

The culprit was clever and said something that saved him from death. What method do you think he must have chosen for his death?

If two's company, and three's a crowd, then whats four and five ?

Spot what is wrong here in below Picture?

When we see 2 but call 10?

Replace the question mark with the correct number.