Book
Maths Puzzle
Algebra
The sum of the digits of a three digit number is 20. The tens digit is three less than the hundreds digit. If the digits are reversed, the new number is 198 more than the original
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Book Other Question
Find three consecutive even integers such that if three is added to the second consecutive even integer, the square of the result is 49
A lab technician has one solution that is 60% chlorinated and another that is 40% chlorinated. How much of each solution is needed to make a 100 L solution that is 50% chlorine?