Question

Find the missing number in the series: 121, 144, 169, 196, ?

• A. 221
• B. 225
• C. 211
• D. 210

Hint:

When working with number series, look for patterns such as perfect squares, arithmetic sequences, or geometric sequences.

Answer 1

The Correct Option is B

Observe that the given numbers are perfect squares: \[ 121 = 11^2, \quad 144 = 12^2, \quad 169 = 13^2, \quad 196 = 14^2 \] The next number in the sequence will be \(15^2 = 225\). Answer: \(\boxed{225}\)