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At a well known store they sell their own blend of coffee. They use:
|costing £13 per kilogram
|costing £14 per kilogram
|costing £17 per kilogram
To make 11 kilograms of this blend of coffee costs £15 per kilogram.
This blend uses more Brazilian than Kenyan coffee.
An exact number of kilograms of each type of coffee is used.
How many kilograms of each type of coffee are used?
Find the smallest integer solution to the equation 1/x^2 + 1/y^2 = 1/z^2
A group of 20 people pay a total of £20 to see an exhibition. The admission price is £3 for men, £2 for women and 50p for children. How many men, women and children are there in the group?
I am exactly n times my daughter's age. In m years I shall be ... How old am I?