From the ten books that you’ve recently bought but not read, you plan to take four with you on vacation. How many different sets of four books can you take?

There are 100 students who are taking history or sociology. If 10 are taking both courses and 45 are taking just history, how many are taking sociology?

Juliette has 348 pennies. If she wants to divide them into sets of 16, how many sets can she make? How many pennies are left over?

On September 9th, a student in Bill Nye's science class answered one chemistry question. Each day after that, the student answered 8 more chemistry questions than the day before. By the end of class on September 30th, how many chemistry questions had the student answered?

You work as a health inspector and must visit each of the 15 restaurants in town once each week, In how many different orders can you make these inspections?

In a school there are 20 teachers who teach mathematics or physics. Of these, 12 teach mathematics and 4 teach both physics and mathematics. How many teach physics ?

Sandy, Sally, Melanie, and Nancy each bought 200 Pokemon cardswhich come in packs of 20. Saly also has 17 baseball cards.How many packs of Pokemon cards do they have in all?

One third of the cars available for sale in a dealership are used cars. If there are 20 new cars, how many cars are there in the dealership?

In her "Continue Watching" list on Netflix, Madelyn has 7 half-hour shows. In how many ways can she select four different half-hour shows to watch from her list?

Bruce, Clark, and Diana found a box of old baseball cards in the attic. They sold 161 cards to a collector and then split the remaining cards equally among themselves. Then, Bruce gave 1/3 cards to Evan. If Evan was given 6 cards, how many cards were in the box when it was found?