Lowest common multiple of two numbers

Difficulty Starter · Set o3lo5j

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1
What is the least common multiple of 9 and 10?
2
What is the least common multiple of 12 and 10?
3
What is the least common multiple of 7 and 12?
4
What is the least common multiple of 7 and 11?
5
What is the least common multiple of 11 and 4?
6
What is the least common multiple of 9 and 7?
7
What is the least common multiple of 6 and 7?
8
What is the least common multiple of 7 and 9?
9
What is the least common multiple of 12 and 10?
10
What is the least common multiple of 10 and 12?
11
What is the least common multiple of 11 and 8?
12
What is the least common multiple of 9 and 12?
13
What is the least common multiple of 4 and 9?
14
What is the least common multiple of 11 and 10?
15
What is the least common multiple of 10 and 8?
16
What is the least common multiple of 11 and 4?
17
What is the least common multiple of 10 and 12?
18
What is the least common multiple of 11 and 12?
19
What is the least common multiple of 4 and 9?
20
What is the least common multiple of 11 and 7?

What is in this set

The numbers in this set run from 4 to 12.
63% of them share no factor at all.
37% of them share a factor.
A careful solution takes 3 written steps on average.
The mistake this set invites most often, in 100% of the problems: that is the greatest common factor — a common multiple is never smaller than either number.
Answers are a whole number.

Drawing 240 problems from this page produced 69 different ones, 29% — so a sheet of 20 will come back to a problem you have seen — there are only so many sensible ones of this kind.

The same skill, harder or easier

We would put this in front of a grade 6 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.