SSC CPO Tier 1 Exam 11 Dec 2025 Shift 1

Concept:The odd number is identified by the digit sum of its square root. Three numbers have an even digit sum, and one has an odd digit sum.Explanation:First, find the square root of each option.1369 = $37^2$. Digit sum of 37 is $3+7=10$ (even).1444 = $38^2$. Digit sum of 38 is $3+8=11$ (odd).1521 = $39^2$. Digit sum of 39 is $3+9=12$ (even).1600 = $40^2$. Digit sum of 40 is $4+0=4$ (even).Only 1444 has an odd digit sum, breaking the consistent pattern of even digit sums in the other numbers.Answer:Option B (1444) is the odd one out.