You need to climb 10 stairs. At each support, you can walk one stair or you can jump two stairs.
In what number alternative ways you'll climb ten stairs? Choose the correct choice from the following answers.
A) 99  B) 79  C) 55  D) 89  E) 66
89
<result>D</result>
You need to climb 10 stairs. At each support, you can walk one stair or you can jump two stairs.
In what number alternative ways you'll climb ten stairs?