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Maths Puzzle
Numerical Ability
solve:
20 0ver x = 20 over x-4 +4 over x
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book Other Question
can you help me solve (x+2)(x-3)=(x-3)^2
Curly can do a job in 30 min, Larry can do it in 40 min, and Moe can do it in 60 min. How long will it take them if they work together?