A class of 55 students is staying at a hostel for a class trip. Each room in the hostel has 4 beds. What is the minimum number of rooms that will be needed to accommodate every student?

A complete roll of quarters is made up of 40 quarters. You have 2443 quarters. If you completely fill up as many rolls as possible, how many complete rolls of quarters will you have?

Express the statement "n is divisible by 13" in terms of the mod.

If n mod 2=12=1, which of the following statements are true about n?

Express the statement "n is a multiple of 11" in terms of the mod.