Brain Teasers
4, -27, 25, -343, 121, ?, ?
Complete the series:
4, -27, 25, -343, 121, ?, ?
4, -27, 25, -343, 121, ?, ?
Answer
-2197 and 289Negative prime numbers alternating squared and cubed
-2^2, -3^3, -5^2, -7^3, -11^2, etc.
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Comments
-2197,349
i'm sorry, the answer is not 349... (-13)^3 = -2197 and the next neg prime number squared is (-17)^2 = 289.
I thought the answer might be another question mark...
Not enough terms to verify 2 alternating seires, For exampel it could be 2^2 add 3 5^2 add 6 11^2 add 9 20^2. Similarly for the other series.
funky pattern
easy
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