Question

Choose the missing term (?) from the given alternatives which is related to the fifth term in the same way as the second term is related to the first term and fourth term is related to the third term. 10 : 95 :: 20 : 395 :: 25 : ?

• A. 625
• B. 620
• C. 595
• D. 610

Hint:

Pattern: \(n^2 - 5\) for each pair

Answer 1

The Correct Option is B

Step 1: Identify the pattern between first and second terms. 10 to 95: \(10^2 = 100\), \(100 - 5 = 95\). So pattern = \(n^2 - 5\).
Step 2: Verify with second pair. 20 to 395: \(20^2 = 400\), \(400 - 5 = 395\). Pattern confirmed.
Step 3: Apply to third pair. 25 to ?: \(25^2 = 625\), \(625 - 5 = 620\).
Step 4: Therefore, the missing term is 620, which matches option (B).