MATHEMATICS

JAMB 2005 - Question 6

Mathematics 2005 JAMB Past Questions - Question 6: Three boys shared some oranges .The first received 1/3 of the orange and the second received 2/3 of the remainder. If the third boy received the remaining 12 oranges, how many oranges did they share?

Three boys shared some oranges .The first received 1/3 of the orange and the second received 2/3 of the remainder. If the third boy received the remaining 12 oranges, how many oranges did they share?
A:
B:
C:
D:
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Correct Answer

B

Explanation

Let x = the number of orangesThe 1st received 1/3 of x = 1/3x∴Remainder = x - 1/3x = 2x/3The 2nd received 2/3 of 2x/3 = 2/3 * 2x/3 = 4x/3The 3rd received 12 oranges∴1/3x + 4x/9 + 12 = x(3x + 4x + 108)/9 = x3x + 4x + 108 = 9x7x + 108 = 9x9x - 7x = 1082x = 108x = 54 oranges

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