If Sam has 5 more marbles than Jack, Jack has 4 more marbles than Frank, and Frank has 5 more marbles than Ted, what is the least number of marbles that must change hands if the four boys are to have an equal number of marbles?
Answer : ( 3 )
lets arrange al in terms of sam and the comparing the numbers of marbles each has more that the person who has least
sam=s marbles= 14 more
frank =s-9=5 more
so shift 5 from sam to ted =shift =5
sam and jack have 9 more shift 2 from then to the other -shifts=4
total shifts=9 and each has 7