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How many seconds are there in an hour?
3600
There are fifty-six days in ..... weeks
8
What is the smallest natural number divisible by all numbers: 1,2,4,5, 10,20,25?
100
What next number follows the pattern: 1, 2, 11, 12, ..., 22, 31?
21
What 3 numbers give the same result when multiplied and added together?
1,2,3
Linh was born in 2007 and Nam was born in 2005. What is the sum of their ages?
38
When Lan was 8, his brother was half her age. Now, Lan is 14. How old is her brother?
10
There is a dozen of eggs in the fridge and your mother fried five of them. How many eggs are remaining?
7
Mary has two daughters and she gives a dozen of eggs to them equally. How many eggs does each daughter get?
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?
50 minutes
John is fifteen and his mother is four times as old as him. So how old is John's mother?
60
When your father is thirty, you are seven. So how old are you when he is forty?
17
The boy is nine years old and his father is five times as old as him. So how old is his father?
45
Your father is sixty and his age is double of yours. How old are you?
30
The sum of Lan's age and Hung's age is 32. And they are the same. How old is Hung?
16
Hoang has 15 pencils. Nam's number of pencils double of Hoang. What is the total number of pencils Hoang and Nam have?
45
