One housekeeper can clean a hotel room twice as fast as another one. Working together they can clean a room in 8 minutes. How long does it take for each housekeeper to clean a room?

Secret Decimal Number Riddle I have 2 ones 22 hundredths 12 tenths What number am I?

What is 9/8 times 250 and also what is 1 1/6 times 250

The difference of two numbers is 685. The smaller of the numbers is 262. What is the other number?

A right rectangular prism has a volume of 48 ft3. Which of the following could not be the dimensions of the prism? l = 2 ft, w = 2 ft, h = 12 ft l = 2 ft, w = 4 ft, h = 6 ft l = 3 ft, w = 2 ft, h = 8 ft l = 4 ft, w = 3 ft, h = 3 ft

Prove n! > = 2^n-1 for all n in the naturals

Mr. Sullivan is organizing teams for the middle school's annual field day. There are eight classes at the school and 21 students in each class. What is the total number of students at the school?

How to solve 9 (2*+8) = 20 - (x+5)

3. Which decimal does the model represent?

The sum of the digits of a two-digit number is equal to 15. If these digits switch places then you will get a number that is 27 less than the original number. Find these numbers.

If you flip a coin 150 times about how many times would you expect to get heads