Q: What are the composite numbers in the multiplication chart?

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Yes.

Yes.

1,4,6,8,9,10,12,14,15,16,18,20,21,22,24,25,26,27,28,30,32,33,34,35,36,38,39,40,42,44,45,46,48,49,50,51,52,54,55,56,57,58,60,62,63,64,65,66,68,69,70,72,74,75,76,77,78,80,81,82,84,85,86,876,88,90,91,92,93,94,95,96,98,99,100

They are all the numbers that have only two factors which are themselves and one whereas composite numbers have more than two factors.

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Related questions

10x10=100 numbers

prime numbers.

Yes.

Yes.

The answer depends on how the numbers are combined: addition, subtraction or multiplication.

1,4,6,8,9,10,12,14,15,16,18,20,21,22,24,25,26,27,28,30,32,33,34,35,36,38,39,40,42,44,45,46,48,49,50,51,52,54,55,56,57,58,60,62,63,64,65,66,68,69,70,72,74,75,76,77,78,80,81,82,84,85,86,876,88,90,91,92,93,94,95,96,98,99,100

show me a multiplication chart

That they are not perfect squares.

It is the identity element of multiplication. That puts it in a special category.

Only in the ones column. Prime numbers aren't multiples of anything but one and themselves.

Sure, you can make a multiplication chart that is any size you want.

There is no name for numbers which are neither prime nor composite.