Multiple choice

Find the missing number (?) in the following sequence. $50 80 55 75 60 70 ?$

  1. $80$
  2. $75$
  3. $60$
  4. $65$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The sequence is: 50, 80, 55, 75, 60, 70, ?. Looking at the pattern: 50 + 30 = 80, 80 - 25 = 55, 55 + 20 = 75, 75 - 15 = 60, 60 + 10 = 70. The pattern alternates between addition and subtraction, with the amount decreasing by 5 each time. The next operation should be subtraction of 5: 70 - 5 = 65, which matches option D.

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