Different lights make me strange by changing me into different sizes. What am I?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

Decode this picture on T-Shirt and tell what it says ?

A newspaper is supposed to have 60 pages.Pages 14 and 21 are missing from the newspaper.

Can you tell me , Which other pages won't be there as well ?

What Deficiency does the below rebus represent?

VIT_MIN

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

If an electric train is travelling south, then which way is the smoke going?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

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?

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