Replace the question mark with the number below given a simple math problem.

Who has married many women but was never married?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

Complete the given grid with valid words. You can only use the letters AAEEIIMMPPTT.

Hint: The grid reads the same across as down.

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

What has no start, end, or centre?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

What does this mean?

CCCCCCC

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?