14. A train lost one sixth of its passengers at the first stop, 25 at the second stop, 20% of the remainder at the third stop, three quarters of the remainder at the fourth stop; 25 remain. What was the original number? (M. I. T.)
References: The chapter on Involution in any algebra. Also the references on the [preceding page].
SQUARE ROOT
Find the square root of:
1.
2.