Remember: A factor pair is two numbers that multiply to make a number. A prime has only two factors, 1 and itself. A multiple is on the number's times table.
Rows and partners
1
21 plants are in 3 equal rows. How many plants are in each row? 3 × = 21
2
40 cookies are on a tray in 5 equal rows. How many cookies are in each row? 5 × = 40
3
Which tray shows 18 cookies?
ABC
4
7 × = 28
5
Is 27 a multiple of 6?
YesNo
6
36 tiles are in 4 rows of 9. Which number is also a factor of 36?
72128
All the factors
7
Is 27 prime, composite or neither?
CompositePrimeNeither
8
Join each number to its factor pairs.
18
218
39
411
A1 × 18, 2 × 9, 3 × 6
B1 × 11
C1 × 9, 3 × 3
D1 × 8, 2 × 4
9
24 tiles make rectangles 1 by 24, 2 by 12, 3 by 8 and 4 by 6. How many factors does 24 have?
10
The tiles make a rectangle with 3 rows of 6. Circle every factor of 18.
246912
11
The table shows the only rectangle 13 tiles can make. So 13 is a prime number.
TrueFalse
12
Put the numbers in order from the fewest factors to the most factors.
11
18
25
10
13
Write every factor of 16 in order. Tell how you know you found them all.
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