Factors & Prime
List all the factors of 18.
1, 2, 3, 6, 9, 18
List the first 4 multiples of 5.
5, 10, 15, 20
Mia has 4 stickers. Ava has 3 times as many. How many does Ava have?
12 stickers
Which is greater: 20 g or 20 kg?
20 kg
24 students are split into 6 equal groups. How many students are in each group?
4 students
Is 31 prime or composite? Explain how you know.
31 is prime — only factors are 1 & 31
Which are multiples of 4: 8, 14, 20, 26, 32?
8, 20, 32
Ben has 6 toy cars. Leo has 5 times as many. Write an equation and solve.
6 × 5 = 30; 30 cars
A small package has a mass of 16 g. A large package is 10 times as heavy. What is its mass?
160 g
Maya has 27 red beads and 16 blue beads. How many beads does she have altogether?
43 beads
List all the factors of 36 and tell whether 36 is prime or composite.
1, 2, 3, 4, 6, 9, 12, 18, 36; composite
Fill in the blanks: ___, ___, 72, 80, 88, ___, ___.
56, 64, 72, 80, 88, 96, 104 — add 8
Emma has 42 cards. That is 7 times as many as Noah has. How many cards does Noah have?
6 cards because 42 ÷ 7 = 6
A student is a little over 1 meter tall. Which is reasonable: 14 cm, 140 cm, or 1,400 cm?
140 cm
A box has 7 broken crayons. Another box has 3 times as many. How many broken crayons are in the second box?
21 crayons
A student says 51 is prime. Are they correct? Prove your answer using factors.
No. 51 is composite: 1, 3, 17, 51
Look at the pattern: 35, 40, 45, 50, 55. Describe the pattern and explain why every number ends in a 0 or 5.
Add 5 each time; multiples of 5 end in 0 or 5
Sam has 8 baseball cards. Taylor has 6 times as many. Which equation represents the situation:
8 × 6 = t
48 ÷ 8 = t
8 + 6 = t
or 48 × 6 = t?
8 × 6 = t; t = 48
A toy has a mass of 30 g. A real object has a mass of 30 kg. Explain why the real object has the greater mass.
30 kg; kilograms are much larger units than grams
One basket has 6 apples. A second has 4 times as many. A third has 8 apples. How many apples are there altogether?
38 apples
A number has the factor pairs 1×24, 2×12, 3×8, and 4×6. What is the number? Is it prime or composite?
24; composite
A pattern increases by the same amount: 42, 49, 56, 63, ___, ___. Give the next two numbers AND explain the rule.
70, 77; add 7 each time
Lily has 9 books. Her teacher has 7 times as many. Write two different equations that could represent the relationship and solve.
9 × 7 = 63 and 63 ÷ 7 = 9; teacher has 63 books
Carlos is about 2 meters tall. About how many centimeters tall is he? Explain how you know.
About 200 cm
One bag has 8 marbles. A second bag has 3 times as many. A third bag has 12 marbles. How many marbles are there altogether? Show your thinking.
44 marbles: 8 + (8 × 3) + 12 = 44