Question : P = 18 × 9 ÷ 6 + 5 × 15 ÷ 25 and Q = 15 ÷ 5 × 5 – 25 ÷ 5, what is the value of (P ÷ Q)?

Option 1: 2.5

Option 2: 2

Option 3: 3

Option 4: 1.5

Question : Find the HCF of $\left(4^{315}-1\right)$ and $\left(4^{25}-1\right)$.

Option 1: $1$

Option 2: $\left(4^{25}-1\right)$

Option 3: $1024$

Option 4: $1023$

Question : The LCM of the two numbers is 4 times their HCF. The sum of LCM and HCF is 125. If one of the numbers is 100, then the other number is:

Option 1: 5

Option 2: 25

Option 3: 100

Option 4: 125

Question : If the surface area of two spheres is in the ratio 81 : 25, then what is the ratio of their radius?

Option 1: 5 : 8

Option 2: 7 : 9

Option 3: 5 : 7

Option 4: 9 : 5

Question : What is the value of (3 ÷ 4) of 20 + 16 ÷ 2 – {(1÷3) of 12 + (2 ÷ 5) of 25 }?

Option 1: 8

Option 2: 7

Option 3: 10

Option 4: 9