## Question

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

A. 21

B. 30

C. 20

D. 11

**Answer: C. 20**

**Solution:**

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.**

Hence, The Answer is **20.**