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Question
primary 6 | Maths
| Ratio
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3 boys had 144 erasers together. A gave some of his erasers to B and B's erasers doubled. B then gave some of his erasers to C and C's erasers doubled. In the end, the three boys had and equal number of erasers each. How many erasers did A have?
Date Posted: 4 years ago
Views: 707
in the end
A: 4 u
B: 4 u
C: 4 u
b4 B to C
A: 4 u
B: 6 u
C: 2 u
at first
A: 7 u
B: 3 u
C: 2 u
12 u = 144
u = 12
at first. Alan has 7x12 = 84 erasers
...
A: 4 u
B: 4 u
C: 4 u
b4 B to C
A: 4 u
B: 6 u
C: 2 u
at first
A: 7 u
B: 3 u
C: 2 u
12 u = 144
u = 12
at first. Alan has 7x12 = 84 erasers
...
See 1 Answer
done
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Look at the ending result and work forward to the at first amount.
Date Posted:
4 years ago
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