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

Find out the missing number in the picture attached:

What can go through glass without breaking it?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

Can you solve this picture maths equation?

What kind of band never plays music?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

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?

What do you get if you add 2 to 100 four times?