LIsa mailed some postcards to 10 of her friends while she was on vacation. She sent three of them 1 postcard each, and the rest of them 2 postcards each. How many postcards did she send in all?

If 111 is divided by 4, the product of the quotient and the remainder is ?

(1 + 2 + 3 + ..... + 49 + 50) + ( 99 + 98 + 97 + ... + 51 + 50) =

If the sum of two consecutive odd numbers is 100, what is the smaller of the two numbers?

Paul read 20 short stories, each 10 pages long. Anne read 10 books, each 50 pages long. How many more pages did Anne read than Paul?

I am thinking of a number. When I subtract 20 from 4 times my number, the result is 100. I am thinking of the number?

My family can eat 40 sandwiches every 3 days. How many sandwiches can we eat in 12 days?

Of the following numbers, which cannot be written as the sum of three different whole numbers, each greater than 0?

If the perimeter of a rectangle is 8 cm what could be its area?

8888 + 220 = 8000 + ?

What is the unit digit of 5x5x5x5x5x5x5x5x5x5x2?

A race began at 3:43 p.m. and ended at 5:57 p.m. the same day. The race was half over at ? p.m.

THe sum of two numbers is 8. If 4 is 3 more than one of the numbers, what is 3 more than the other number?