Question

Find the missing number based on the relationship between the first pair:
17:578::31:___

• A. 1922
• B. 1961
• C. 1875
• D. 589
• E. 1671

Answer 1

The correct option is A 1922

578 is = $2\times {17}^2$
So, required number should be $2\times {31}^2$ = $2\times 961$ = 1922