CBSE Class 8 Mathematics Power Play MCQs Set A

Question. What is the approximate thickness of a sheet of paper after 30 folds, assuming an initial thickness of 0.001 cm?
(a) 131 cm
(b) 10.7 km
(c) 670 m
(d) 1.024 cm

Answer: B

Question. Practice of offering goods equal to weight of a person is called.
(a) Pooja
(b) Tulābhāra
(c) Dāna
(d) Yatra

Answer: B

Question. A billion in the international system is 10 raised to.
(a) 8
(b) 9
(c) 10
(d) 12

Answer: B

Question. Lifespan of an adult mayfly is about.
(a) 1 hour
(b) 1 day
(c) 1 week
(d) 1 month

Answer: B

Question. What is the result of (−4) × (−4) × (−4)?
(a) 12
(b) -64
(c) -12
(d) 64

Answer: B

Question. Any number x (not zero) raised to the power 0 is always.
(a) 0
(b) x
(c) 1
(d) 10

Answer: C

Question. Writing numbers using powers of 10 like (4 x 10 raised to 4) is called.
(a) Simple form
(b) Expanded form
(c) Long form
(d) Short form

Answer: B

Question. Standard form of scientific notation for 308100000 is.
(a) 30.81 x 10 raised to 7
(b) 3.081 x 10 raised to 8
(c) 308.1 x 10 raised to 6
(d) 3.081 x 10 raised to 9

Answer: B

Question. What rule applies when dividing two different bases raised to the same exponent, such as mᵃ/nᵃ?
(a) (m/n)^a
(b) (m × n)^a
(c) (m+n)^a
(d) (m−n)^a

Answer: A

Question. Highest numerical value banknote ever printed was in which country?
(a) India
(b) Zimbabwe
(c) Hungary
(d) America

Answer: C

Question. 10 raised to 6 seconds is approximately.
(a) 1 day
(b) 11.57 days
(c) 1 year
(d) 31 years

Answer: B

Question. A million in the international system is 10 raised to.
(a) 5
(b) 6
(c) 7
(d) 9

Answer: B

Question. How many rooms were there altogether in 'The Stones that Shine' riddle?
(a) 3³
(b) 3⁴
(c) 3⁵
(d) 3⁷

Answer: B

Question. The number 10 raised to 100 is also called a.
(a) Million
(b) Googol
(c) Billion
(d) Trillion

Answer: B

Question. Estimated number of stars in observable universe is.
(a) 10 raised to 20
(b) 2 multiplied by 10 raised to 23
(c) 10 raised to 15
(d) 5 multiplied by 10 raised to 21

Answer: B

Question. The number 10 raised to googol is called a.
(a) Googolplex
(b) Googol-plus
(c) Super-googol
(d) Big-googol

Answer: A

Question. If a sheet of paper is folded 46 times, how thick will it approximately be?
(a) The height of Burj Khalifa
(b) The depth of the Mariana Trench
(c) Around 100 cm
(d) More than 7,00,000 km

Answer: D

Question. Every 10 folds, the thickness increases by.
(a) 10 times
(b) 100 times
(c) 1024 times
(d) 500 times

Answer: C

Question. If population changes from 2 x 10 raised to 7 to 2 x 10 raised to 8, it becomes.
(a) Double
(b) 10 times more
(c) Half
(d) Same

Answer: B

Question. n multiplied by itself a times is written as.
(a) n + a
(b) na
(c) n multiplied by a
(d) a raised to n

Answer: B