exam Maths Puzzle Numerical Ability

mixed practice 20 page 689

x y
- + -
2 3
------
2 3
- - -
x y

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exam Other Question

Graph the inequality on a plane

4x+5y<=20
Problem with word problem, please Help!!

An auditorium has 13 doors numbered 1 through 13. In how many ways can a person enter through an even numbered door and leave through a