A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What do you think with the below Picture ?

What common phrase is represented by the below lines

Easy going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Medium going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Tough going:
Weak, 'I can't do it, I'm staying!'
Tough, 'Let's get going.'

In the picture given below, can you find out which digit will take place of the question mark?

What has 88 keys?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

Can you replace the question mark with the correct number?