CBSE Class 8 Mathematics Power Play MCQs Set B

Question. The scientific notation of 0.00000000052 is
(a) 5.2 × 10_-30
(b) 5.2 × 10^-9
(c) 52 × 10^-11
(d) 0.52 × 10⁹

Answer: A

Question. Reading very large numbers is hard because we might.
(a) Forget the number
(b) Miscount the zeroes
(c) Write small letters
(d) Add extra numbers

Answer: B

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

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. The standard form for 234000000 is
(a) 2.34 × 10⁸
(b) 0.234 × 10⁹
(c) 2.34 × 10⁸
(d) 0.234 × 10²

Answer: A

Question. 561.903 written with 10 raised to minus 1 belongs to which digit?
(a) 5
(b) 6
(c) 9
(d) 3

Answer: C

Question. If each tree has 10000 leaves and total trees are 32000 then the total number of leaves in standard form is
(a) 3.2 × 10⁸
(b) 3.2 × 10⁷
(c) 0.32 × 10⁷
(d) 32 × 10⁸

Answer: A

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

Answer: B

Question. How many Northern White Rhinos are left in the world in 2025?
(a) 100
(b) 2
(c) 10
(d) 50

Answer: B

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

Answer: B

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

Answer: B

Question. Convert 0.00004 56 to standard form. Which of the following is true regarding the exponent in the standard form ?
(a) The exponent is -4
(b) The exponent is -5
(c) The exponent is -6
(d) The exponent is -7

Answer: B

Question. The Sun is very far from the centre of our Milky Way galaxy, about.
(a) 30,00,00,00,00,00,00,00,00,000 m
(b) 1,00,00,00 m
(c) 5000 m
(d) 10,00,00,00,000 m

Answer: A

Question. Linear growth is additive but exponential growth is.
(a) Subtractive
(b) Multiplicative
(c) Slow
(d) Simple

Answer: B

Question. To cover distance to Moon, paper folds needed are only.
(a) 10
(b) 46
(c) 100
(d) 1000

Answer: B

Question. Which of the following is correct?
(a) n^a × n^b = n^ab
(b) (n^a)^b = n^a+b
(c) na + n^b = n^a-b
(d) n0 = 0

Answer: C

Question. Pādayātra is the traditional practice of.
(a) Running
(b) Walking long distances
(c) Swimming
(d) Driving

Answer: B

Question. In international system, a thousand billion is a.
(a) Million
(b) Trillion
(c) Quadrillion
(d) Billion

Answer: B

Question. Komodo dragons are found only in which country?
(a) India
(b) Indonesia
(c) Brazil
(d) Kenya

Answer: B