exam
Maths Puzzle
Numerical Ability
multiplying polynomials
r^3(2r^2-5r-1)
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exam Other Question
the total peso value of 29 coins made up of 5-coins and 10-coins
A 25% SOLUTION OF ALCOHOL IS TO BE MIXED WITH A 40% SOLUTION TO GET 50l OF A FINAL MIXTURE THAT IS 30% alcohol. How much of each of the original solution should be used?