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Which number continues 25, 49, 121, 169, ... ?

Competition practiceNumber Series

A289
B225
C256
D196

Step-by-Step Solution

These are squares of consecutive primes:

5^{2}, 7^{2}, 1 1^{2}, 1 3^{2}

. The next prime is 17, and

1 7^{2} = 289

.

Answer: A) 289

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