CBSE Class 8 Mathematics Power Play MCQs Set E

Question. How many possible combinations are there for a 2-digit lock, where each digit can be from 0 to 9?
(a) 100
(b) 20
(c) 1000
(d) 10

Answer: A

Question. The Himalayas grow by a few mm every.
(a) Day
(b) Year
(c) Month
(d) Week

Answer: B

Question. Dinosaurs first appeared more than how many years ago?
(a) 1 crore
(b) 20 crore
(c) 50 crore
(d) 5 crore

Answer: B

Question. If we have a line 16 units long and we erase half, it becomes.
(a) 10 units
(b) 8 units
(c) 4 units
(d) 12 units

Answer: B

Question. What general rule is established for multiplying exponents with the same base, like n^a × n^b?
(a) n^axb
(b) n^(a+b)
(c) (n × n)^(a+b)
(d) n⁽^(a-b)

Answer: C

Question. Distance around the Earth is approximately.
(a) 10,000 km
(b) 40,000 km
(c) 1,00,000 km
(d) 5,000 km

Answer: B

Question. Gap between consecutive steps of the ladder to reach Moon is taken as.
(a) 10 cm
(b) 20 cm
(c) 50 cm
(d) 1 m

Answer: B

Question. Erasing half of the line two times in a row will result in.
(a) 8 units
(b) 4 units
(c) 2 units
(d) 1 unit

Answer: B

Question. How is n × n × n × n × n × n × n expressed in exponential form?
(a) n to the power of 7
(b) n to the power of 6
(c) 7 raised to the power of n
(d) n multiplied by 7

Answer: A

Question. If a 16 cm line is halved three times, it is written as.
(a) 2 raised to 4 divided by 2 raised to 3
(b) 16 minus 3
(c) 16 divided by 3
(d) 2 raised to 3

Answer: A

Question. The rule for dividing powers with same base is n raised to a divided by n raised to b is.
(a) n raised to (a plus b)
(b) n raised to (a minus b)
(c) n multiplied by (a minus b)
(d) Zero

Answer: B

Question. Fixed increase in distance with each step is called.
(a) Exponential growth
(b) Linear growth
(c) Fast growth
(d) Multiplicative growth

Answer: B

Question. What general rule is established for a 'power of a power' expression, like (n^a)^b?
(a) n^(axb)
(b) n^(a-b)
(c) n^(a÷b)
(d) n^(a+b)

Answer: A

Question. The Universe was formed about how many years ago?
(a) 4.5 billion
(b) 13.8 billion
(c) 1 billion
(d) 100 billion

Answer: B

Question. In Buddhist text Lalitavistara, hundred kotis are called.
(a) Ayuta
(b) Niyuta
(c) Kankara
(d) Sarvajna

Answer: A

Question. Total steps needed to reach Moon with linear growth is.
(a) 100 steps
(b) 192 crore and 20 lakh steps
(c) 50 lakh steps
(d) 10 billion steps

Answer: B

Question. What is the rule for division of exponents with the same base, like n^a ÷ n^b?
(a) n^(axb)
(b) n^(a-b)
(c) n^(b-a)
(d) n^(a+b)

Answer: B

Question. Distance between Sun and Saturn is 1.4335 multiplied by.
(a) 10 raised to 10
(b) 10 raised to 11
(c) 10 raised to 12
(d) 10 raised to 15

Answer: C

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

Answer: B

Question. Standard form for the number 34,30,000 is.
(a) 34.3 x 10 raised to 5
(b) 3.43 x 10 raised to 6
(c) 3.43 x 10 raised to 4
(d) 343 x 100

Answer: B