WBCS.LIVE practice question

In writing the numbers from 10 to 100, how many times is the digit 7 used?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 20
  2. 19
  3. 10
  4. 11

Correct answer and explanation

Correct answer: 19

Explanation: āœ… Correct Answer: B) 19 šŸ“š Explanation: When counting the digit 7 from 10 to 100, it appears in the units place of 17, 27, 37, 47, 57, 67, 77, 87, and 97 (9 times). It also appears in the tens place from 70 to 79 (10 times). Wait, the number 77 is counted in both groups. So, 9 plus 10 equals 19. Therefore, the digit 7 is used exactly 19 times in the numbers from 10 to 100.