Select the option that is related to the third number in the same way as the second number is related to the first number.
8 : 81 :: 10 : .....
The logic here is
$$\left(8+1\right)^2=9^2=81$$Â $$\longrightarrow\ $$Â $$\left(\text{first number}+1\right)^2=\text{second number}$$
Similarly, $$\left(\text{third number}+1\right)^2=\text{fourth number}$$
Fourth number = $$\left(10+1\right)^2=11^2=121$$
$$\therefore\ $$121 is related to 10 in the same way 81 is related to 8.
Hence, the correct answer is Option A
Create a FREE account and get:
