If you know the diameter of a circle, how do you find its circumference?

What's 1*1:3+8:3*6+9:100*450+489 equal to?

X * (-3+5), Write an equivalent expression

The door on the computer center has a lock which has five buttons numbered from 1 to 5. The combination of numbers that opens the lock is a sequence of five numbers and is reset every week.

Is it possible for a 5 digit number to be rounded up to a 6 digit number

What's negative 4 over 6 as an equivalent fraction.

Ken likes to build domino trains. He uses boxes of double-six dominoes which contain 28 dominoes. If he built a train with over 500 dominoes, what would be the fewest number of boxes he needed? What operation is needed? What numbers are to be used?

A baker lives 11 blocks away from the store. the baker walks to the store and back, taking a two-block detour each way. how many blocks did the baker walk in total?

How can transformations be used to solve real world problems?

Chris needs to find the product of two numbers. One of the numbers is 6. The answer also needs to be 6. How will he solve this problem? Explain

I have 8 M&Ms. There are 2 green ones in the pack. What is the proportion of green M&Ms in the pack?