Q.

Two-Third of a number is less than the original number by 10. What is the original number?


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a

10

b

20

c

30

d

40 

answer is C.

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Detailed Solution

Given, two-third of a number is less than the original number by 10.
Let the number be x.
According to the question, 23x=x-10
Solve the equation for x.
23x=x-10
23x-x=-10
2x-3x3=-10
-x3=-10
x = 30.
Hence, option 3 is correct.
 
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