exam Maths Puzzle Numerical Ability

Mix a solution that is 50% acid with a solution that is 100% water to make 4L of a solution that is 10% acid. How much of each solution do you use?

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exam Other Question

Young's rule is a rule-of-thumb method used to determine the portion of an adult dose of medication to administer to a child. If A represents the age of the child, the rule states Write an english version of the following equations;

a) 2x-5=x+1

b) 2(x+2)=14

c) n+5=n/2-6

d) 7-3a = 5+a