Determine the integer whose product with (–1) is -21.

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-21

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-22

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-1

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Solution

The correct option is A 21
We know that multiplication of an integer by 1 will result in the same number whereas multiplication of an integer with -1 changes the sign of the integer.
Given an integer multiplied with -1 is -21.
So, the integer to which -1 is multiplied is - (-21) = 21.

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