Multiple choice

Directions: In the following question, a number series is given with one term missing. Choose the correct alternative that will continue the same pattern and fill in the blank space. 20, 19, 17, (...), 10, 5

  1. 12

  2. 13

  3. 14

  4. 15
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The pattern is: 20-1=19, 19-2=17, 17-3=14, 14-4=10, 10-5=5. The missing number is 14.

AI explanation

The differences between the consecutive terms decrease by consecutive integers. The difference between 20 and 19 is 1, the difference between 19 and 17 is 2, and the difference between 17 and the missing term must be 3. Adding 3 to 17 gives 14, which is verified by the remaining differences of 4 and 5.

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