Multiple choice general knowledge math & puzzles

6 , 10 , 4 ; 8 , 12 , 4 ; 7 , 13 , 6 ; 5 , 13 , ?

  1. 6

  2. 7

  3. 8

  4. 9
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In each set, the third number is the difference between the second and first: 10-6=4, 12-8=4, 13-7=6. For the last set, 13-5=8.

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