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Maths Puzzle
Numerical Ability
A sum of money amounting to $5.15 consists of 10 cents and 25 cents. If there are 32 coins in all, how many 25 cents are there?
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book Other Question
a test solution of gasohol contains 60L of gasoline and 15L of alcohol. How much pure alcohol must be added so that the resulting solution is 25% alcohol?
I don't remember if I already asked these or not, so here they are.
Solve each inequality. State the solution set using interval notation and graph it.
w^2 - w < 0
x