exam
Maths Puzzle
Numerical Ability
in how many ways can we seat three of five boys and three of five girls if boys and girls must alternate?
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exam Other Question
Was I able to factor this correctly?
4x^2-15x-25
=(2x+5)(2x+5)
Mr. Irwin and Ms. Lippi are math teachers. They have a total of 46 years of teaching. Two years ago Mr. Irwin had taught 2.5 times as many years as Ms. Lippi. How long has each taught?