Olympiad Test: Exponents and Powers


20 Questions MCQ Test NCERT Mathematics for CAT Preparation | Olympiad Test: Exponents and Powers


Description
Attempt Olympiad Test: Exponents and Powers | 20 questions in 20 minutes | Mock test for Class 7 preparation | Free important questions MCQ to study NCERT Mathematics for CAT Preparation for Class 7 Exam | Download free PDF with solutions
QUESTION: 1

The value of (−1)250 is

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QUESTION: 2

The value of (−1)75 is

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QUESTION: 3

The value of (−1)450 is

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QUESTION: 4

The value of (−1)91 is

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QUESTION: 5

The value of (−1)310 is

Solution:

Since the power is an even integer , the minus sign will get cancelled. So we will receive 1 only.

QUESTION: 6

The value of 28 is

Solution:
QUESTION: 7

Simplify and write in exponential form of 22x 25

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QUESTION: 8

Simplify and write in exponential form of (− 4)100× (−4)20

Solution:

When bases are same, powers are added. So we will add powers 
(-4)100(-4)20=(-4)120

QUESTION: 9

Simplify and write in exponential form of 52× 57× 512

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QUESTION: 10

The value of 22 is

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QUESTION: 11

The exponent in the expression 37 is _______

Solution:

3 raised to the power of 7 here three is called base and other one is exponent.

QUESTION: 12

The value of 30 is ________ .

Solution:
QUESTION: 13

The value of 50 is ________ .

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QUESTION: 14

The value of 70 is ________ .

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QUESTION: 15

The value of 110 is ________ .

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QUESTION: 16

Multiplicative inverse of 1/5 is

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QUESTION: 17

Multiplicative inverse of 1/7 is

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QUESTION: 18

Multiplicative inverse of 1/3 is

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QUESTION: 19

Multiplicative inverse of 9 is

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QUESTION: 20

Multiplicative inverse of 21 is

Solution:

Multiplicative inverse means is a number which when multiplied by x yields the multiplicative identity, 1. A number multiplied by 21 wich give 1 is the reciprocal of 21 which is 1/21

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