What four weights can be used to balance from 1 to 30 pounds?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Identify The phrase in the picture.

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

Count the number of triangles in the below picture?

What has many keys but can’t open a single lock?

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?