CBSE Class 8 Mathematics Power Play MCQs Set H

Question. Building a ladder to the Moon with 20 cm steps is an example of.
(a) Fast growth
(b) Exponential growth
(c) Linear growth
(d) Multiplicative growth

Answer: C

Question. In magical pond, lotuses double every.
(a) Hour
(b) Day
(c) Week
(d) Night

Answer: B

Question. If pond is full on day 30, it was half full on.
(a) Day 15
(b) Day 29
(c) Day 28
(d) Day 1

Answer: B

Question. For a 3-digit lock, total combinations are.
(a) 300
(b) 1000
(c) 999
(d) 100

Answer: B

Question. If the initial thickness of a paper is ‘v’ and it is folded 10 times, what expression describes its final thickness?
(a) 2¹⁰
(b) 2¹⁰v
(c) 102v
(d) 10v

Answer: B

Question. Take a sheet of paper and fold it once, the thickness will be.
(a) Half
(b) Double
(c) Triple
(d) Same

Answer: B

Question. Value of (-4) cubed is.
(a) 64
(b) -64
(c) 12
(d) -16

Answer: B

Question. If 5^a ÷ 5² = 5⁷ then the value of a is
(a) 2
(b) 5
(c) -5
(d) 9

Answer: D

Question. 2 raised to minus 1 is equal to.
(a) -2
(b) 1/2
(c) 0
(d) 2

Answer: B

Question. (4 squared) cubed can be written as.
(a) 4 raised to 5
(b) 4 raised to 6
(c) 4 raised to 8
(d) 4 raised to 23

Answer: B

Question. General rule (n raised to a) raised to b is.
(a) n raised to (a plus b)
(b) n raised to (a minus b)
(c) n raised to (a multiplied b)
(d) n

Answer: C

Question. For a non-zero rational number z, (z-2)3 is equal to
(a) z⁶
(b) z^-6
(c) z1
(d) z⁴

Answer: B

Question. If the cost of a land increases linearly at ₹ 5000 per year. If initial cost of the land is ₹ 50000 then the value after 6 years is
(a) ₹ 70000
(b) ₹ 80000
(c) ₹ 60000
(d) ₹ 125000

Answer: B

Question. Estu says a paper cannot be folded more than how many times?
(a) 5 times
(b) 7 times
(c) 10 times
(d) 2 times

Answer: B

Question. Tallest building in the world Burj Khalifa is.
(a) 500 m
(b) 670 m
(c) 830 m
(d) 1000 m

Answer: C

Question. After 30 folds, thickness is 10.7 km which is height where.
(a) Birds fly
(b) Planes fly
(c) Clouds stay
(d) Kite fly

Answer: B

Question. On which day was the 'Magical Pond' half full if it doubles every day and is completely covered on the 30th day?
(a) 29th day
(b) 1st day
(c) 25th day
(d) 15th day

Answer: A

Question. Which grows faster?
(a) Linear growth
(b) Exponential growth
(c) Both a and b
(d) Can not compared

Answer: B

Question. 4 + 4 + 4 is 3 x 4, but 4 x 4 x 4 is.
(a) 4 x 3
(b) 4 cubed
(c) 12
(d) 444

Answer: B

Question. Value of any number n (not zero) with power 0 is.
(a) 0
(b) 1
(c) n
(d) 10

Answer: B