Question

find the next number in the following sequence. 17,35,69,139,277​

Answer 1

The next number in the sequence is

2(277)+1=555

35=2(17)+1

69=2(35)-1

139=2(69)+1

277=2(139)-1

Answer 2

heya!

So, the sequence is like:

➡17

Multiply by 2 and add 1,

➡17×2+1=35

Multiply by 2 and subtract 1,

➡35×2-1=69

Similar procedure:

➡69×2+1=139

➡139×2-1=277

So, the next number in the sequence will be:

➡277×2+1=554+1=555

Answer:555