1 . The sum of all even numbers from 21 to 34 ...
2 . The greatest distinct 2 digit number ...
3 . 1/5 of 140/4
4 . Hoa bought 2 dozens of table tennis balls and she had to pay 48 dollar
     Lan buys 8 of the same , then how much does Lan have to pay to seller ?
     Answer : ... dollar
5 . The last digit of the product 
1 * 2 * 3 * 4 * ... * 11 is 

1 . The sum of two consecutive odd number is 248
The smaller number is ...
2 . The least natural number is ...
3 . The sum of the digit of a ten digit number is equal to 9 ... 
4 . The ratio of two numbers is 3 : 7 and their sum is the smallest 3 digit number . Their different is ... 

1 . the sum of two numbers is the greatest 3 digit number and their difference is the greatest 2 digit number 
the greater number is

2 . the sum of the smallest 3 digit number and 241 is

3 . the product of the numbers is 2364
the product of double the first number and triple the second number is 
the ratio of two number is 2 : 4 and their sum is 270
the greater number is