exam Maths Puzzle Numerical Ability

What is the sum of the first 50 natural numbers?

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exam Other Question

Which of the following defines what a conic section is?

(a) A curve made by intersecting a cone with a plane.
(b) A curve made by all the points a fixed distance from a certain Find the slope of the graphed lines of 0 ,1, -2 and undefined. HUH? I dont get it.