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Question
primary 5 | Maths
| Whole Numbers
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How to do
r beads: 2u
g beads: u
after
r beads: 2u
g beads: u-30
2u = 4 . (u-30)
u = 60
(a)
at first, total = 3 . 60 = 180 beads
(b)
60 +30 = 90 more red beads in the end
...
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