✅ GCF and LCM: Quick Check (6.NS.B.4)

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Find the greatest common factor and least common multiple of two whole numbers. Work on your own. Then check your answers.

1. GCF of 44 and 17 = ___

2. LCM of 25 and 37 = ___

3. GCF of 12 and 54 = ___

4. LCM of 60 and 11 = ___

5. GCF of 49 and 53 = ___

6. LCM of 26 and 4 = ___

7. GCF of 15 and 21 = ___

8. LCM of 44 and 45 = ___

9. GCF of 56 and 56 = ___

10. LCM of 60 and 40 = ___

Score: ____ / 10 I can find the greatest common factor and least common multiple of two whole numbers: ☐ yes ☐ almost ☐ not yet

Answer key: 1) 1 · 2) 925 · 3) 6 · 4) 660 · 5) 1 · 6) 52 · 7) 3 · 8) 1980 · 9) 56 · 10) 120

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Worksheets › Grade 6 Math › GCF and LCM › GCF and LCM

Grade 6 (ages 11–12)Numbers & mathsFree printable PDF

About this grade 6 worksheet

Free Grade 6 math worksheet (Common Core 6.NS.B.4): gcf and lcm — a ten-question quick check (quiz), with answer key. Skill: Find the greatest common factor and least common multiple of two whole numbers. Level: Grade 6 — also suits Year 7 (UK).

For teachers: skills & standards

CCSS 6.NS.B.4: Find the greatest common factor and least common multiple of two whole numbers
Works as a morning-work page, a centre/station activity, homework or an early-finisher task.

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What age is it for?

It is designed for Grade 6 (ages 11–12), but use it with any child who is ready.

What skills does it build?

Find the greatest common factor and least common multiple of two whole numbers.

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More “GCF and LCM” printables (6.ns.b.4: find the greatest common factor and least common multiple of two whole numbers)

GCF and LCM: Practice A (6.NS.B.4) · GCF and LCM: Practice B (6.NS.B.4) · GCF and LCM: Mixed Practice & Reasoning (6.NS.B.4) · GCF and LCM: Show Your Thinking (6.NS.B.4)

All 5 gcf and lcm sheets → · Grade 6 Math: all 10 skills → · All Common Core grades

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