Question : If A is equal to 20% of B and B is equal to 25% of C, then what percentage of C is equal to A?

Option 1: 10

Option 2: 15

Option 3: 5

Option 4: 20

Question : If $x+y+z = 9$, then the value of $(x−4)^3+(y−2)^3+(z−3)^3−3(x−4)(y−2)(z−3)$ is:

Option 1: 6

Option 2: 9

Option 3: 0

Option 4: 1

Question : If $a-b=1$ and $a^{3}-b^{3}=61$, then the value of $ab$ will be:

Option 1: –20

Option 2: 20

Option 3: 30

Option 4: 60

Question : If $a+b=1$, then $a^4+b^4-a^3-b^3-2a^2b^2+ab$ is equal to:

Option 1: 1

Option 2: 2

Option 3: 4

Option 4: 0

Question : If the simple interest for 5 years is equal to 25% of the principal, then the interest will be equal to the principal after _______ years.

Option 1: 20

Option 2: 30

Option 3: 25

Option 4: 22