Factors, Multiples & Primes
ten difficulty levels, timed, click to reveal
Difficulty
HCF and LCM by listing
1 · First five multiples
2 · All the factors
3 · Primes in a range
4 · HCF by listing
5 · LCM by listing
6 · HCF of 3 numbers
7 · LCM of 3 numbers
8 · HCF problems
9 · LCM problems
10 · HCF/LCM: one more step
Mixed 1–10
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L4
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L10
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