Question

The number is 123456789 and 999999999 are multiplied. How many of the digits in the product are 9's?

Answer 1

NONE

Well 123456789*999999999 = (123456789 * 1,000,000,000) - 123456789

123456789 * 1,000,000,000 = 123456789000000000

Subtract

123456789000000000-

..................123456789

------------------------------

12345678876543211

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Answer 2

123456789*999999999

=1234567888766543211

So there are no 9's in the product.

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