1.

Find two numbers whose product is a 1-digit number and the sum is a 2-digit number.

Answer»

Clearly, for given condition which is, two numbers whose product is a 1-digit number and the sum is a 2-digit number, 1 and 9 satisfy.

Here, 

1×9=9 and 1+9=10 

Hence, 1 and 9 are required numbers



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