Prime, Composite and Factors
Is 21 a composite number?
Yes. (The factors are 1,3,7,21)
Solve.
7(24/3)
56.
What is the greatest multiple of 5 less than 27?
25.
Is 99 a composite number?
Yes. (The factors of 99 are 1,3,11,33,99)
Solve.
25+(7x3)
46.
What is the greatest multiple of 7 that is less than 50?
49.
Riley has 3 baker's dozen doughnuts. How many does she have?
39.
What are the factors of 24?
1,2,3,4,6,8,12,24
Solve 27 times 35 with an area model.
945.
What is 728 divided by 16?
45 with a remainder of 8.
Is 83 a prime number?
Yes. (The only factors are 1,83.)
Solve 98 times 26 with an area model.
2,548
What is 24 times 36?
864.
Carrin has 17 stickers. She gets 19 times that on her birthday. She decides she has too many, so she gives away 13 to her friends. How many stickers does she have now?
310.
What are the factors of 72?
1,2,3,4,6,8,9,12,18,24,36,72.
Solve: 275(7+5)
3300.
What is 8,565 divided by 84?
101 with a remainder of 81.