What will come in place of the question mark (?) in the following series?
45, 52, 60, 69, 79, ?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 90
The series grows by uneven steps, so look at the difference between each pair of terms. The differences become one larger each time:
\(52-45=7\)
\(60-52=8\)
\(69-60=9\)
\(79-69=10\)
The next difference is 11, so the missing term is \(79+11=90\).