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Maths Puzzle
Numerical Ability
The chorus has six sopranos and eight baritones. In how many ways can the director choose a quartet that contains at least one soprano?
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book Other Question
Tell whether the line that passes through the two given points is parallel or perpendicular (or neither) to a line with a slope of -2.
(4,3) (6,1)
(4,3) (6,4)
(4,3) (6,3)
-24 -(-34)