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Q.

Adding 9 to the twice of a whole number gives 31. What is the whole number?


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a

10

b

4

c

11

d

13 

answer is C.

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Detailed Solution

Given, adding 9 to the twice of a whole number gives 31.
Let the whole number be x.
According to the question, 2x + 9 = 31.
2x = 31 - 9
2x = 22
x=222
x = 11
Therefore the whole number is 11.
Hence, option 3 is correct.
 
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Adding 9 to the twice of a whole number gives 31. What is the whole number?