If 21x = 79x, what is the value of x?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

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

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Find out the missing number in the picture attached:

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Using Only Five 5's and any mathematical operator make sum as 37