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

A) 11 B) 18 C) 20 D) 21

Answer & Solution

Correct Answer: Option C

Clearly, from 1 to 100, there are ten 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.

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7 Comments

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Dhananjaya Upadhyay 5 years ago

The answer will be 20 as 33 has two 3 so but you don't have to count 33 Twice..

Payal Bharti 5 years ago

It’s wrong 3 appears 19 times between 1-100

Deepika Sharma 5 years ago

But why you count 33 two times

Harishwar M 5 years ago

The answer is 20 only. We have to consider 33 as 2 count not as 1,because we are writing two 3s there

Sikander Singh 5 years ago

Answer should be 21.

Asad Ali 6 years ago

The answer is 19. He has counted 33 twice.

Wasiq Khan 9 years ago

the answer is 21 because their is two times 3 in the figure of 33 so 10+11= 21

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If you write down all the numbers from 1 to 100...

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

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