SATHEE: Quantitative Aptitude Ques 858

Quantitative Aptitude Ques 858

Question: The average of three consecutive odd numbers is 12 more than one-third of the first of these numbers. What is last of the three numbers?

Options:

A) 15

B) 17

C) 19

D) 21

Show Answer

Answer:

Correct Answer: C

Solution:

Let the smallest number be $ (2x-1). $ Then, consecutive number are $ (2x+1), $ $ (2x+3). $ According to the question, $ \frac{(2x-1)+(2x+1)+(2x+3)}{3}=( \frac{2x-1}{3} )+12 $

$ \Rightarrow $ $ 2x+1=\frac{2x-1+36}{3} $

$ \Rightarrow $ $ 6x+3=2x+36-1 $

$ \Rightarrow $ $ 4x=32 $
$ \Rightarrow $ $ x=\frac{32}{4}=8 $

$ \therefore $ Third number $ =(2x+3)=(2\times 8+3)=19 $

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Quantitative Aptitude Ques 858

Question: The average of three consecutive odd numbers is 12 more than one-third of the first of these numbers. What is last of the three numbers?

Options:

Answer:

Solution:

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