CBSE Class 8 Mathematics Power Play MCQs Set J

Question. In Indian system, a Lakh is 10 raised to the power.
(a) 4
(b) 5
(c) 6
(d) 7

Answer: B

Question. In Indian system, a Crore is 10 raised to the power.
(a) 5
(b) 7
(c) 8
(d) 10

Answer: B

Question. African elephant population in 2018 was around.
(a) 1 lakh
(b) 4.15 lakh
(c) 10 lakh
(d) 50,000

Answer: B

Question. In scientific notation, a number is written as x × 10ʸ. What are the conditions for ‘x’?
(a) x is any integer
(b) x ≥ 1 and x < 10
(c) x = 0
(d) x > 10

Answer: B

Question. Global human population as of 2025 is estimated at.
(a) 1 billion
(b) 8.2 billion
(c) 5 billion
(d) 10 billion

Answer: B

Question. Mesmerising aerial display of thousands of starlings is called.
(a) Dance
(b) Murmuration
(c) Cloud
(d) Circle

Answer: B

Question. Global chicken population is estimated at about.
(a) 1 billion
(b) 33 billion
(c) 10 million
(d) 50 billion

Answer: B

Question. Which of the following is larger?
(a) 2.3 × 10²
(b) 23.2 × 10
(c) 232 × 10^-1
(d) 232000 × 10^-2

Answer: D

Question. Estimated population of ants globally is.
(a) 1 quadrillion
(b) 20 quadrillion
(c) 100 trillion
(d) 1 billion

Answer: B

Question. Number of grains of sand on all beaches and deserts is about.
(a) 10 raised to 15
(b) 10 raised to 21
(c) 10 raised to 10
(d) 10 raised to 25

Answer: B

Question. Estimated number of water drops on Earth is.
(a) 10 raised to 20
(b) 2 multiplied by 10 raised to 25
(c) 10 raised to 30
(d) 10 raised to 15

Answer: B

Question. Which of the following is the standard form of 3456/1000000?
(a) 0.0003456
(b) 0.0000003456
(c) 3.456 × 10^-2
(d) 3.456 × 10^-3

Answer: D

Question. Time taken for blood to complete one full circulation is.
(a) 1 second
(b) 10 to 20 seconds
(c) 1 minute
(d) 5 minutes

Answer: B

Question. If 92x-3 = 729 then the value of x is
(a) 2
(b) 3
(c) 4
(d) 6

Answer: B

Question. Time taken for light to reach Earth from Sun is about.
(a) 1 minute
(b) 8 minutes
(c) 15 minutes
(d) 1 hour

Answer: B

Question. What is the value of any non-zero number raised to the power of 0, i.e., x⁰?
(a) x
(b) 1
(c) Undefined
(d) 0

Answer: A

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

Answer: B

Question. Estimated number of atoms in universe is between 10 raised to.
(a) 10 to 20
(b) 78 to 82
(c) 100 to 105
(d) 50 to 60

Answer: B

Question. Which country printed a 100 trillion dollar note in 2009?
(a) India
(b) Zimbabwe
(c) Hungary
(d) USA

Answer: B

Question. If x = 2.5 × 10^-3 andy = 1.5 × 10^-4 ‘then which of the following is true about x + y when expressed in standard form?
(a) 4.0 × 10^-3
(b) 1.75 × 10^-4
(c) 2.65 × 10^-4
(d) 0.00265

Answer: D