Multiple choice

The series given below has one wrong number. Find that number. $5, 10, 17, 27, 37, 50, 65$

  1. 10

  2. 17

  3. 37

  4. 27

  5. 50
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The differences between consecutive terms should increase by 2: +5, +7, +9, +11, +13, +15. Verifying: 5+5=10, 10+7=17, 17+9=26 (not 27), 26+11=37, 37+13=50, 50+15=65. The term 27 should be 26, making 27 the wrong number.

Keep practicing — related questions