MEDIUM
7th CBSE
IMPORTANT
Earn 100

Assume x and y are two negative numbers. ‘The result of the multiplication of x and y with the same positive power is greater than the multiplication of x and y with the same negative power.’

Important Questions on Exponents and Powers

HARD
7th CBSE
IMPORTANT

Which of the following statements is true?

Statement-1 : If x=234÷232, then value of x2+2x+3is 0

Statement-2 : If (-12)4×-28=-24x then x=1

HARD
7th CBSE
IMPORTANT
Which of the following numbers is equivalent to 3100+3100+3100?
HARD
7th CBSE
IMPORTANT
The speed of light is 3×108 m/s. The earth is at a distance of the earth from the sun is 1.5×108 km. Roughly, how long does it take for light from the sun to reach the earth?
HARD
7th CBSE
IMPORTANT

Shyam is trying to find the general formula to find the sum, 2-1+2-2+2-3+2-4+...+2-n.

He checked a few patterns.

2-1+2-2=34,  2-1+2-2+2-3=782-1+2-2+2-3+2-4=1516 and so on.

Which of the following, gives the sum of n terms?

HARD
7th CBSE
IMPORTANT
Bharat is trying to solve the problem, 25+25+25+...+25, added 625 times. Which of the following is equivalent to the above sum?
HARD
7th CBSE
IMPORTANT

Varsha is trying to solve the puzzle below in which x is a positive integer.

x5x=(81x)x

What is the value of x?