Right answer!
Another easy :
A new medical building containing 100 offices had just been completed. Dave was hired to paint the numbers 1 to 100 on the doors. How many times will Dave have to paint the number nine?
2 kids row first 2 other side
1 kid gets back & dad gets in..
wen dad in da other side,gets down, da other kid rows back again..
den both da kids row 2 meet dad..
den i kid returns so mum cn go 2 other side..
wen mon goes other side.da kid comes back 2 pick up his bro..