If you write down all the numbers from 1 to 100, then how many times do you write 3? 

This question was previously asked in
NPCIL Assistant Grade-1 (HR/F&A/C&MM/Steno Grade-I) Official Paper-II (Held In: 2022)
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  1. 11
  2. 18
  3. 20
  4. 21

Answer (Detailed Solution Below)

Option 3 : 20
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NPCIL Assistant Grade 1 Computer Knowledge Subject Test - 01
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Detailed Solution

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According to the question:

From 1 to 100 there are 10 numbers with 3 as the unit's digit - 3, 13, 23, 33, 43, 53, 63, 73, 83, 93

And ten numbers with 3 as the ten's digit - 30, 31, 32, 33, 34, 35, 36, 37, 38, 39

So, required number = (10 + 10) ⇒ 20

∴ 3 is written 20 times

Hence, "Option 3" is the correct answer.

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