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Maths Puzzle
Algebra
Your teacher is giving you a test worth 100 points containing 40 questions. There are 2-point and 4-point questions on the test. How many of each type of question are on the test?
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- 30 2-point and 10 4-point questions
Let 'x' be the number of 2-point questions and 'y' 4-point question
x+y = 40 ---(1)
2x+4y = 100
===> x+2y = 50---(2)
(2)-(1)
y = 10
x = 30
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