Select the odd group of numbers. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g.13– Operations on 13 such as adding /subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

Question

Question

This question was previously asked in

SSC CGL 2022 Tier-I Official Paper (Held On : 03 Dec 2022 Shift 2)

Answer 1

The pattern followed here is:

Logic: (First number)² - 10 = Second number.

Let's check each option one by one.

Option 1) 13 — 159

⇒ (13)² - 10

⇒ 169 - 10 = 159

Option 2) 9 — 71

⇒ (9)2 - 10

⇒ 81 - 10 = 71

Option 3) 5 — 31

⇒ (5)2 - 10

⇒ 25 - 10 = 15 ≠ 31

Option 4) 17 — 279

⇒ (17)2 - 10

⇒ 289 - 10 = 279

Hence, the correct answer is "5 - 31".