exam
Maths Puzzle
Numerical Ability
A vat contains 100 l of a 40% solution. How much acid must be added to increase the acidity to 60%?
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exam Other Question
Write each expression in simplest form.
4r^2 - 25s^2 / 2r^2 + 3rs - 20s^2
The length of a rectangular playing field is 5 ft less than twice its width.
If the perimeter of the playing field is 230 ft, find the length and width of the field