Factors and Multiples flashcards
26 practice cards drawn from the Factors and Multiples lessons. Tap a card to turn it over. Every answer is checked against the lesson it came from.
Read the Factors and Multiples lessons in full →
Share 28 into rows of 3. How many are left over?
1
from “Dividing Exactly”
Share 36 into rows of 4. How many are left over?
0
from “Dividing Exactly”
Which of these is a factor of 20?
10
from “Factors”
Which of these is a factor of 30?
6
from “Factors”
How many factors does 12 have?
6
from “Factor Pairs”
18 = 6 × what?
3
from “Factor Pairs”
Which is a multiple of 7?
28
from “Multiples”
Which is a multiple of 6?
18
from “Multiples”
A number divides by 10…
when it ends in 0
from “Divisibility Tests”
Which of these divides by 2?
14
from “Divisibility Tests”
Crossing out multiples of 7 removes which of these?
49
from “The Sieve of Eratosthenes”
Crossing out multiples of 2 removes which of these?
18
from “The Sieve of Eratosthenes”
Break 30 into primes
2 × 3 × 5
from “Prime Factorization”
Break 8 into primes
2 × 2 × 2
from “Prime Factorization”
Which divides both 9 and 12?
3
from “Common Factors”
Which divides both 8 and 12?
2
from “Common Factors”
8 = 2 × 2 × 2 and 12 = 2 × 2 × 3. Their HCF?
4
from “The Highest Common Factor”
Highest common factor of 10 and 15?
5
from “The Highest Common Factor”
Which do both 4 and 6 divide into?
12
from “Common Multiples”
Which do both 4 and 10 divide into?
20
from “Common Multiples”
Lowest common multiple of 4 and 10?
20
from “The Lowest Common Multiple”
18 = 2 × 3 × 3 and 30 = 2 × 3 × 5. Their LCM?
90
from “The Lowest Common Multiple”
Lighthouses flashing every 9 and every 12 seconds. When do they agree?
LCM
from “Choosing Between HCF and LCM”
Ropes of 16 m and 24 m cut into equal lengths. Longest piece?
HCF
from “Choosing Between HCF and LCM”
Ribbons 16 cm and 24 cm: longest equal piece, no waste?
8
from “HCF and LCM Word Problems”
Ribbons 20 cm and 30 cm: longest equal piece, no waste?
10
from “HCF and LCM Word Problems”