Wednesday, June 12, 2013

puzzle with explanation

Ques:  Mala was playing marbles with her friend Lila. I heard Mala say to Lila," If u give one of ur marbles, i will have as many as u".Lila replied,"If u give one of ur marbles, i will have twice as many as u".How many marbles each had?

Exp: 1.The two numbers should be less than ten considering the condition of twice(num > 10 wont be twice by lending one).
        2. The diff. between the numbers should be two.
        3. Num should be between 3 & 9(1 & 2 wont satisfy the condition)
        4. In this limit 5 & 7 will satisfy all the condition.
Ans:   7-1 = 5+1
          7+1 = 2*(5-1)