# Chapter 2: Indices & Standard Form - Math Mcqs for Grade 8 - Set 3

1)   By simplifying the following 2b⁴ x 8b⁷ ⁄₁₆b⁵ x 2b³, the answer will be

a. 3⁄2b³
b. 3⁄4b³
c. 1⁄2b³
d. 2b³
 Answer  Explanation ANSWER: 1⁄2b³ Explanation: No explanation is available for this question!

2)   If 54x⁷ is divided by 6x² then the answer will be

a. 9x⁹
b. 9x⁵
c. 5x⁹
d. 6x⁹
 Answer  Explanation ANSWER: 9x⁵ Explanation: No explanation is available for this question!

3)   By solving the (4x)³, the answer will be

a. 84x²
b. 64x²
c. 64x4
d. 64x³
 Answer  Explanation ANSWER: 64x³ Explanation: No explanation is available for this question!

4)   By simplifying (2a³b⁴ )⁶ ⁄(4a³b)² x (a²b²), the answer will be

a. 4a⁸ b¹⁸
b. 4a¹⁰ b²⁰
c. 4a¹⁰ b¹⁵
d. 4a⁵ b⁸
 Answer  Explanation ANSWER: 4a¹⁰ b²⁰ Explanation: No explanation is available for this question!

5)   By simplifying the (xy²z)-³ ⁄(x³y³z³)-² , the answer will be

a. x²y³
b. x-³ z-³
c. x³z³
d. x²z-³
 Answer  Explanation ANSWER: x³z³ Explanation: No explanation is available for this question!

6)   The product of a⁵ b² and a² is

a. a³b²
b. a⁴ b²
c. a⁷ b²
d. a¹⁰ b²
 Answer  Explanation ANSWER: a⁷ b² Explanation: No explanation is available for this question!

7)   If 52a¹⁰ is divided by 4a⁸ then the answer will be

a. 15a²
b. 18a²
c. 21a²
d. 13a²
 Answer  Explanation ANSWER: 13a² Explanation: No explanation is available for this question!

8)   If 4x = 1⁄64 then the value of 'x' is

a. -1
b. -4
c. -3
d. -2
 Answer  Explanation ANSWER: -3 Explanation: No explanation is available for this question!

9)   By simplifying the 3x-⁴ ⁄10y-⁴ for positive indices, the answer will be

a. 3/10(y/x)⁴
b. 10/3(y/x)⁴
c. 10/3(x/y)⁴
d. (3x/10y)⁴
 Answer  Explanation ANSWER: 3/10(y/x)⁴ Explanation: No explanation is available for this question!

10)   The product of 9.2 x 10⁵ and 4.3 x 10⁹ is

a. 3.96 x 10¹¹
b. 3.96 x 10¹³
c. 3.96 x 10¹⁹
d. 3.96 x 10⁷
 Answer  Explanation ANSWER: 3.96 x 10¹³ Explanation: No explanation is available for this question!