Multiple choice

Directions: In the following question, there is a certain relationship between two given numbers on one side of (: :) and one number is given on the other side of (: :) while another number is to be found from the given alternatives having the same relationship with this number as the numbers of the given pair bear. Choose the best alternative.

8 : 10 : : 15 : ?

  1. 17

  2. 5

  3. 12

  4. 18

  5. 8
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct answer as it follows the correct relationship x2 - 1 : x2 + 1, i.e. x = 3, x2 - 1 = 8 and x2 + 1 = 10. So, if x = 4 and x2 - 1 = 15, then x2 + 1 = 17.

Keep practicing — related questions