Question

General Intelligence and reasoning question 15,31,63,127, ?what next..

Answer 1

255 is the next number because according to the sequence 15×2+1 =31 , 31×2+1=63 , 63×2+1=127 , 127×2+1 will be 255 .
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Answer 2

now we can see that the sequence is following a pattern

31-15=16, 63-31=32, 127-63=64

now every time we have to double the previous no. so 64×2= 128 so next no. will be 127+128= 255

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