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How many 9s are there between 1 and 100?

Correct answer: C. 19

  • A. 10
  • B. 11
  • C. 19
  • D. 20

Explanation

To find how many times the digit '9' appears between 1 and 100, we need to check both the units and tens places. In the units place, '9' appears in the following numbers: 9, 19, 29, 39, 49, 59, 69, 79, 89, which totals 10 occurrences. In the tens place, '9' appears in 90, contributing an additional count. Therefore, the total number of '9's from 1 to 100 is 10 (units) + 1 (tens) = 19. Hence, the correct answer is Option C (19). The other options are incorrect due to either undercounting or miscounting occurrences of '9'.

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Logical problems present several conditions about people, objects, events or choices and require their possible arrangements to be tested. They cover constraint-based reasoning, rankings, matching, grouping, scheduling and elimination, with attention to the difference between a complete solution and a possibility that merely satisfies one condition.

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