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So there is a rule about multiples of 9 in general: something is a multiple of 9 if and only if its digits add up to a multiple of 9. 6+4 = 10, so it is not a multiple of 9. There's also a neat trick to remembering the multiples of 9 below 99 with your fingers, but you can look this up if you're interested.

Q: How can use use the digits 6 and 4 to decide if 64 is the product of 9 and 7?

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A product with which you end is like......um...for example:8x8=64, So 64 is the product

64

10

64

64*1000 = 64000

Related questions

88

(3+3+3)*(3+4)=9+12+9+12+9+12=27+36=63

A product with which you end is like......um...for example:8x8=64, So 64 is the product

64

64

10

The answer is 8.

64 = 26

64

64*1000 = 64000

That's a false statement. Both 16 and 64 have one prime factor. 16 can't be the LCM of two prime numbers and 64 can't be the product. If you leave out the word prime, you can use 16 and 4.

Um... this question just plain makes no sense. No, 9X7 is not 64.