If I write down all the numbers from 1 to 100, then how many times I have written the digit 3 ? Option 1: 20 Option 2: 11 Option 3: 18 Option 4: 21

Answer: 20. Solution: In the units place, 3 appears in 3, 13, 23, 93, which is 10 times. In the tens place it appears in 30 to 39, another 10 times. Total = 10 + 10 = 20.

Quantitative Reasoning

Number System

Easy

If I write down all the numbers from 1 to 100, then how many times I have written the digit 3 ?

✅ Correct Option: 1

In the units place, 3 appears in $3, 13, 23, \dots, 93$ , which is 10 times. In the tens place it appears in $30$ to $39$ , another 10 times.

Total $= 10 + 10 = 20$ .

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