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There is no number that goes into both. must be a trick question

this is another person not the same one :)

the number that goes into 12 and 21 is 3 which is a 5th grade problem

who ever said theres no number that goes into 12 and 21 is WRONG!

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Q: What number goes into 12 and 21?

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The HCF of the given numbers is 1

Nothing.. Because 21 is a Prime number

(21/x) (12/100)= 175

The number is 1.

It is the number 1

21 is composite number because it has more than one number that goes into it

No even number gose in 21. In fact there is none that goes in 21, either.

3 is a prime factor of 12 and of 21.

The number is 1.

1

7

It is: 1