Arslan and Bilal have some marbles with them. Arslan told Bilal "if you give me 'x' marbles, both of us will have equal number of marbles". Bilal then told Arslan "if you give me twice as many marbles, I will have 30 more marbles than you would". Find 'x'?
Correct answer: B. 5
- A. 4
- B. 5
- C. 6
- D. 8
- E. None of these
Explanation
Let Arslan have A marbles and Bilal have B marbles. If Bilal gives x marbles, A + x = B - x, so B - A = 2x; if Arslan gives 2x marbles, B + 2x = A - 2x + 30, so B - A + 4x = 30. Substituting gives 2x + 4x = 30, hence x = 5 marbles. The likely mistake is option c, 6, from treating the second transfer as x marbles instead of twice x marbles.
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