Post #1659697
2026-04-21 07:02 UTC
Replies (7)
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@isleofmandan@mstdn.social 2026-04-21 07:08
@peterrowlett If you look at the popular answers you'd see 12 and 24 a lot. Probably find that 0 isn't really all that common. 🤪
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@robinhouston@mathstodon.xyz 2026-04-21 07:50
@peterrowlett Proud of your son, and furious with whoever marked the homework?
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@christianp@mathstodon.xyz 2026-04-21 07:54
@peterrowlett automatic homework?
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@ppscrv@mathstodon.xyz 2026-04-21 08:14
@peterrowlett 9 and 12 are common multiples of 3; 4 and 8 are common multiples of 4. They are on the clock, they turn up all the time. I can imagine myself, at 10, thinking that was absolutely what they meant and being mortified when it turned out they wanted something else.
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@richardelwes@mathstodon.xyz 2026-04-21 08:45
@peterrowlett The appropriate response might depend on what definition they gave of “multiple”(or “common multiple”)?
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@jonathanavt@mastodon.nl 2026-04-21 10:51
@peterrowlett If 0 isn’t an even number as many say, why would it be a multiple of 12? /s
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@RobJLow@mathstodon.xyz 2026-04-21 13:40
@peterrowlett Awkward, isn't it? If you allow 0, the lcm of any two non-negative integers is 0, which isn't ideal. I don't know if there's a clean way to set up the terminology if you want to work with non-negative rather than strictly positive integers.