Chu Wei Hao's answer to Vera's Primary 4 Maths question.
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3 boxes: A, B and C.
Total = A + B + C = 84 marbles
Assuming Sarah already moved marbles from B and C to A, all 3 boxes will have equal marbles.
84 marbles are split equally between A, B and C. (A=B=C)
So each box will have 28 marbles. (84/3)
If we return the marbles back to B and C (take back 5 and give back 3 respectively), A will have (28-3+5= 30 marbles)
Therefore, A originally had 30 marbles. (B has 23; C has 31; total 84)
Total = A + B + C = 84 marbles
Assuming Sarah already moved marbles from B and C to A, all 3 boxes will have equal marbles.
84 marbles are split equally between A, B and C. (A=B=C)
So each box will have 28 marbles. (84/3)
If we return the marbles back to B and C (take back 5 and give back 3 respectively), A will have (28-3+5= 30 marbles)
Therefore, A originally had 30 marbles. (B has 23; C has 31; total 84)
Date Posted:
7 years ago
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