Practice30Create account

One number in 4, 11, 25, 53, 109, 222, 445 breaks the pattern. Which is it?

Competition practiceNumber Series
  • A109
  • B222
  • C53
  • D445

Step-by-Step Solution

Each term = previous × 2 + 3: 4 → 11 → 25 → 53 → 109 → 221 → 445. So 222 should be 221.
Answer: B) 222

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Number Series practice questions

More Number Series practice

One term in 1, 2, 6, 24, 120, 620, 5040 does not fit the pattern. Which is it?What is the next term in the series: 4, 6, 10, 18, 34, ?Find the incorrect term: 4, 7, 13, 25, 50, 97.The series 50, 51, 55, 65, 80, 105 has one wrong term. Which is it?Which term is wrong in the series 3, 8, 15, 24, 34, 48?