Question 7

# In the following question, select the related number from the given alternatives.12 : 50 :: 18 : ?

Solution

The logic here is

$$\left(12\times5\right)-10=60-10=50$$ $$\longrightarrow\$$ $$\left(\text{first number}\times5\right)-10=\text{second number}$$

Similarly, the required number = $$\left(18\times5\right)-10=90-10=80$$

Hence, the correct answer is Option C