CTET 2 Math and Science Jul 2013 Paper

Question : 35 of 120

Marks: +1, -0

When half of a number is increased by 15, the result is 39. The sum of digits of the original number is

Solution:

Let the number be x.
From question,

\;\;{x}/{2}+15=39⇒x+30=78

∴x=78–30=48

Sum of the digits of

48=4+8=12

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