Question

The number of non-negative integers which are less than 1000 and with only one zero is​

Answer 1

Answer:

0 itself is a non negative integer(single digit). 9×1 = 9 integers which end in exactly one 0(2 digit numbers). 9×9×1 = 81 integers which end in exactly one zero (3 digit). Thus, 91 numbers are there which satisfy this condition.

Explanation:

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