Man in the Well
A man is in a well that is 50m deep. He tries to get out of the well and in doing so he takes a jump of 5m each time but falls back 4m due to steep slope. When he jumps to 5m , he falls down to 1m. Then from 1m he jumps to 6m but falls back to 2m. In how many jumps , will he get out of the well ?