Mary was skip counting with a friend during recess. Mary started to count by 12's. She said 12, 24, 36. What two numbers will she say next?
She will say 48 and 60.
100
What are the prime numbers between 10 and 20?
11, 13, 17, 19
100
Look carefully at the number pattern. 14, 17, 16, 19, 18, What rule does this pattern follow?
Rule: Add 3, Subtract 1
200
List the factors of 24 and 36.
Then, circle the common factors.
Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24
Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36
The common factors are 1, 2, 3, 4, 6, 12.
200
Which number is a multiple of 12 and 36?
A) 12
B) 24
C) 36
36 is a multiple of 12 and 36.
200
Can a composite number be an odd number? Explain your answer.
Yes, some examples are 9, 15, and 25.
200
Look carefully at this pattern. 70,67,71,68,72,69...
Rule: Subtract 3, Add 4
300
There are 12 boys and 18 girls in Ms. Ruiz’s science class. Each lab group must have the same number of boys and the same number of girls. What is the greatest number of groups Ms. Ruiz can make if every student must be in a group?
Factors of 12: 1, 2, 3, 4, 6, 12
Factors of 18: 1, 2, 3, 6, 9, 18
The Greatest Common Factor of 12 and 18 is 6. The greatest number of groups Ms. Ruiz can make is 6.
300
Carl has a soccer game every 4th day, Matt has one every 5th day. When will they have a game on the same day?
The Least Common Multiple is 20, so they will both have a game on the 20th day.
300
Is 2 a prime number or a composite number? Explain your answer.
2 is a prime number. Prime numbers only have one pair, 1 and itself as factors.
300
Look carefully at the number pattern.
27, 35, 33, 41, 39, 47 ...
What rule does this pattern follow?
Rule: Add 8, Subtract 2
400
Peter has 18 oranges, 27 pears, and 12 bananas. He wants to make fruit baskets with the same number of each fruit in each basket. How many of each type of fruit will be in the baskets?
18: 1, 2, 3, 6, 9, 18
27: 1, 3, 9, 27
12: 1, 2, 3, 4, 6, 12
There will be 3 of each fruit in a basket.
400
Lisa thinks that 57 and 67 are both prime because they both have a 7 in the ones place. Is she correct? Explain your answer.
57 is not a prime number. 1, 3, 19, 57
400
Look carefully at the pattern. 80, 72, 64, 56, 48, 40... What are the next three numbers in this pattern?
32, 24, 16
500
Ella is making treat bags for her friends. She bought 20 stickers. List all the different ways Ella can make
treat bags if each treat bag has the same amount of stickers inside?
There are 6 different ways. 1 x 20, 2 x 10, 4 x 5, 5 x 4, 10 x 2, 20 x 1
500
List 2 prime numbers between 50 and 80.
Possible answers are 51, 53, 59, 61, 67, 71, 73, and 79.