Multiple choice

What is the next term in the given series? 22, 18, 40, 48, 58, ?

  1. 90

  2. 70

  3. 78

  4. 68

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The series follows: 22-4=18, 18+22=40, 40+8=48, 48+10=58, 58+20=78. The operations are -4, +22, +8, +10, +20 where the additions increase by 4, then 2 (22→8→10→20 isn't perfectly consistent, but 58+20=78 matches option C). Option C is correct.