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?

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?

Which alphabet is a part of our body?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

Can you find the company name in the pictogram below?

I have eight fingers and two thumbs but I do not live. What Am I?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?