Find the missing number in the following numerical series:
4, 9, 25, 49, 121, ?
Answer and explanation
Correct answer: D. 169
- Step 1: Analyze the pattern of terms in the sequence: , , , , .
- Step 2: The bases are consecutive prime numbers: . The next prime number in the sequence is . Therefore, the missing term is .
Answer
169.
Why not the others: '144' is (12 is composite); '196' is (14 is composite); '225' is (15 is composite).
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