Factors and Multiples
Complete the pattern by skip counting:
7, 14, 21, 28, ___, ___, ____
35, 42, 49
Prime or composite?
21
Composite
Solve:
20 x 41
820
450 divided by 5
90
List all the factors for 36.
1, 2, 3, 4, 6, 9, 12, 18, and 36
Prime or composite?
29
Prime
Solve.
12 x 14
168
Solve.
800 divided 4
200
Which one is NOT a multiple of 8?
48, 54, 64, 72, 80
54
Can a prime number be a multiple of any number except itself?
Yes. A prime number can be a multiple of 1 and its self.
Solve.
78 x 23
1,794
783 divided by 3
261
1, 2, 3, 6
True or False:
If a number is a multiple of 5, it is a composite number.
True.
Joey solved 54 x 47 and got 15,942 as their answer. Can Joey be correct? Why or why not?
No, they cannot be right because when you multiply 2-digit by 2-digit numbers, you can never get a 5 digit answer as your product.
Solve.
7,469 divided by 3
2,489 remainder 2