100+ Surds and Indices Aptitude Questions and Answers - 2

Question: 6

If 10^x = $${1}/{2}$$ , then 10^-8x = ?

(A) 8

(B) 16

(C) 256

(D) 312

Question: 7

(64)⁴ ÷ (8)⁵ = ?

(A) (8)²

(B) (8)³

(C) (8)⁸

(D) (8)¹²

Question: 8

(2.4 × 10³) ÷ (8 × 10^-2) = ?

(A) 3 × 10^-5

(B) 3 × 10⁴

(C) 3 × 10⁵

(D) 30

Ans: B

Question: 9

(3)⁸ × (3)⁴ = ?

(A) (27)³

(B) (27)⁵

(C) (729)²

(D) (729)³

Question: 10

If a^x = b, b^y = c and c^z = a, then the value of xyz is

(B) 1

(C) ab

(D) abc