CHRISTMAS
Five presents were bought for Christmas
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The red and purple presents together cost £39, The purple and blue presents together cost £36, The blue and yellow presents together cost £35, The yellow and green presents together cost £26, The green and red presents together cost £22, What is the total cost of all five presents?
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| Algebra
| Problem Solving
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The total cost of the five presents can easily be found by adding up the five costs given in the question then dividing by 2. Can you work out why?
The answer is £79.
If you are interested, the individual presents cost:
red = £17, purple = £22, blue = £14, yellow = £21, green = £5.
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