If you write down all the numbers from 1 to 100, then how many times do you write 2 ?  Choose the correct choice: A) A)11 B) B)18 C) C)20 D) D)21 E) E)22
Explanation:   Clearly, from 1 to 100, there are ten numbers with 2 as the unit's digit- 2, 12, 22, 32, 42, 52, 62, 72, 82, 92; and ten numbers with 2 as the ten's digit - 20, 21, 22, 23, 24, 25, 26, 27, 28, 29.   So, required number = 10 + 10= 
<gadget id="calculator">10 + 10</gadget>
<output>20</output>
20.   Answer: 20
<result>C</result>
If you write down all the numbers from 1 to 100, then how many times do you write 2 ?