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primary 6 | Maths
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Before :
Gary stamps = 3 units
Henry = 4 units
Total = 7 units = 140 stamps
1 unit = 140 stamps ÷ 7 = 20 stamps
So number of stamps Gary had
= 20 x 3
= 60 stamps
After:
Gary stamps = 1 unit
Henry = 3 units
Total = 4 units = 140 stamps
1 unit = 140 stamps ÷ 4 = 35 stamps
Number of stamps Gary now has
= 35 stamps
Number of stamps Gary gave Henry
= 60 - 35
= 25
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