Using the rule of if a number is odd then plus one, but if the number is even divide by two. What number will take 19 moves to get to 1?

Question

For example 65, 66, 33, 34, 17, 18, 9, 10, 5, 6, 3, 4, 2, 1 takes 13 moves to get to one.

Answer 1

Hannah, continue backward 6 more steps.

 

65(2) = 130

130 - 1 = 129

129(2) = 258

258 - 1 = 257

257(2) = 514

514 - 1 = 513

 

Does it work?

 

513, 514, 257, 258, 129, 130, 65, 66, 33, 34, 17, 18, 9, 10, 5, 6, 3, 4, 2, 1

 

Boom.