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Primary 4 | Maths
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So we must count the loaves and trays in multiples and the respective number of bread slices and eggs in them.
1 sandwich requires 1 egg and 2 bread slices.
No matter how many sandwiches you make, the number of bread slices must be twice the number of eggs used.
So we do listing of the eggs and bread slices.
Eggs : 6,12,18,24,30,36,42,48,54,60
Bread : 10,20,30,40,50,60,70,80,90,100,110,120
We can see that the combinations where number of bread slices = 2 tomes number of eggs are :
30 eggs, 60 bread slices
60 eggs, 120 bread slices
Least number of slices = 60
Least number of loaves = 60 ÷ 10 per loaf
= 6
Or
number of sandwiches = number of eggs used (Since only 1 egg is used in every sandwich)
= 30
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