exam Maths Puzzle Numerical Ability

A bus for school feild trip costs P624. Since the number of persons making the trip is 13 less the capacity of the bus, it costs P8 more per student than if the bus is filled. How many students are in the trip?

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exam Other Question

If i have a triangle at the cordinates are B(-4, 5), C(12, 10) and A(9,-6). How do i find the perppendicular bisector side AC? I know you find the midpoint but what do you do after that? A real estate agent received a 2% commission on the sale of a home. If the home sold for $761,000, how much was her commission?

i come up with .2X761,000 = $15220.00 am i heading in the right direction.