Number Puzzle #127
What will be the next number in the series 6,15,28,45,???
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6,15,28,45
If we see, it difference is forming a GP.
Difference
9,13,17
Next difference should be 21
thus next number in original sequence should be 45+21 = 66
If we see, it difference is forming a GP.
Difference
9,13,17
Next difference should be 21
thus next number in original sequence should be 45+21 = 66
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array 1 : [3,5,7,9,11,13,…]
array 2 : [2,3,4,5,6,7,8,…]
result : array1[index] x array2[index]
(3×2) (5×3) (7×4) (9×5) (11×6)
66
You can also check for the difference
6 15 28 45 66
9 13 17 21
4 4 4
66