So you're adding 3, 5, 7, 9, 11 etc
1, 4, 9, 16, 25, 36, 49
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The next square number after 16 is 25
16+25 = 41 which is an odd number and also a prime number
The number is 1.
the next number in the sequence is 25............starting at the beginning, you add the odd numbers to the existing number to get the answer. Add "1" to 0, get 1; add "3" to 1, get 4; add "5" to 4, get 9; add "7" to 9 to get 16........and add "9" to 16 to get 25.........
16+6=22 22+3=25 25+0=25 Answer = 25 ps. forget about the 2nd, 4th, 6th number, they don't matter.