### Brain Teasers

# 4, 9, 25, ...

What number comes next in this series?

4, 9, 25, 49, 121, 169, ??

4, 9, 25, 49, 121, 169, ??

### Answer

289.The series is the squares of the prime numbers. The next prime number is 17, and 17x17=289.

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