What next number follows the pattern: 160, 80, 60, 30,....?

Hoang has 15 pencils. Nam's number of pencils double of Hoang. What is the total number of pencils Hoang and Nam have?

There are fifty-six days in ..... weeks

Mary has two daughters and she gives a dozen of eggs to them equally. How many eggs does each daughter get?

The sum of Lan's age and Hung's age is 32. And they are the same. How old is Hung?

Nam leaves his house at 6 a.m for his office. It takes him 65 minutes by train. But if he takes a bus, he spends 25 minutes. At what time does he get to the office by bus?

Linh was born in 2007 and Nam was born in 2005. What is the sum of their ages?

There is a dozen of eggs in the fridge and your mother fried five of them. How many eggs are remaining?

Nam leaves his house for school at 6 a.m. Then the train takes him 25 minutes. After that, he catches a taxi to get there at 7.15 a.m. How long does the taxi take him?

When your father is thirty, you are seven. So how old are you when he is forty?

John is fifteen and his mother is four times as old as him. So how old is John's mother?

The boy is nine years old and his father is five times as old as him. So how old is his father?

How many seconds are there in an hour?