Think of a number, divide it by 5 and add 10 to it. The result is 21. What is the number thought of?
Choices:
A) 24 B) 55 C) 297 D) 267 E) 29
Explanation :   21-10= 
<gadget id="calculator">21-10</gadget>
<output>11</output>
11   11 x 5= 55   Answer : 55
<result>B</result>
Think of a number, divide it by 5 and add 10 to it. The result is 21. What is the number thought of?