exam
Maths Puzzle
Numerical Ability
sqrt 50x^3 divided by 81y^8
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exam Other Question
A chemist has 300 grams of 20% hydrochloric acid solution. He wishes to drain some off and replace it with an 80% solution so as to obtain a 25% solution. How many grams must be drain and replace it with 80% solution.
g=t2-2