Surds and Indices - Quantitative Aptitude (MCQ) questions for Q. 21524

Q.  Find the value of X.
(15)3.5 * (15)x = 158
- Published on 05 May 16

a. 2.29
b. 2.75
c. 4.25
d. 4.5

ANSWER: 4.5
 
Let (15)3.5 * (15)x = 158
Then, (15)3.5 + x = (15)8
3.5 + x = 8
x = (8 – 3.5)
x = 4.5

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