Exponents And Powers Test

Result

Exponents And Powers Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

The number which is multiplied by (-7)² to obtain a product equal to 35 is

A
7/5

B
(-5)/7

C
5/7

D
(-7)/5

Solution

Let the number be x.

Then,
(-7)² × x = 35

x = 35/49
x = 5/7
Question 2
1 / -0

The value of x⁴ + y⁶, if x = 7 and y = 3 is

A
3002

B
3303

C
3130

D
2938

Solution

x⁴ + y⁶
= 7⁴ + 3⁶

= 2401 + 729
= 3130
Question 3
1 / -0

A jeweller spends Rs. 90,000 on buying a gold block from a miner. If the jeweller has 2 x 10⁴blocks of gold, then find out the total money spent on gold by the jeweller.

A
Rs. 18 x 10⁹

B
Rs. 18 x 10⁸

C
Rs. 18 x 10¹⁰

D
Rs. 18 x 10⁷

Solution

Total amount spent on gold

= 90000 (2 x 10⁴)
= Rs. 18 x 10⁸