She has to go down 4, back up to 0, and then up another 4, then back to 0.I<span>f positive 1 represents the first level above ground, negative numbers are a good choice to represent levels below ground. 8 flights; starting at -4 and moving to 4.</span>
If the sub is closer to the surface later, we thus know that it traveled upwards.
It would be 10x10 =100 or in other word 10 times itself. Also known as 10 with the 2 hanging over the 10.
A) 1,3,5,7,9,11,13,15
There r 8 odd number rooms
