ritula wrote:

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?

1. 7

2. 8

3. 9

4. 14

5. 28

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

jack=s-5=9 more

frank =s-9=5 more

ted=s-14=0 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