How many ways are there to distribute n graded homeworks to n students such that none of them gets their own homework back?

Mom had just filled the cookie jar when the tree children went to bed. That night, one child woke up, ate half the cookies, then went back to bed. Later the second child woke up, ate the remaining of the cookies, then went back to bed.

Trent bought a new flash drive. The flash drive was originally $25, but was on sale for 20% off. How much was the discount on the flash drive?

Is 8 4/5 greater than 8.08

A kid's pool had a small opening though which water leaked out sometimes. Water was poured into the pool from time to time.

The sum of eighty five and five times a number is equal to twenty. Find the number

Order from least to greatest 3 3/6, 3 5/8, 2 9/10

Suppose that a box of 12 items from a manufacturing company is known to contain 2 defective and 10 non-defective items. How many samples of 5 items contain 1 defective item?

A particle starts from rest at X=8 and proceeds with a simple harmonic motion so that after 2 seconds it reaches x=4 find an expression for the displacement an=t any time t

If the probability that 42 or fewer kids in a group of 57 like pizza is 79%, what is the probability that at least 43 kids in the group like pizza?

What is the answer to this math problem? 4x7x (-9)