Exam Maths Puzzle General Mental Ability

I could use your help. There are 24 spooks in the haunted house. The number of scarecrows is equal to the number of witches plus 4. The number of witches is equal to the number of ghosts minus 8. how many witches and ghosts and scarecrows are there?



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Exam Other Question

1. let f be a quadratic function with a minimum value of -22100, a line of symmetry of x = 140, and a y-intercept of (0,-2500).
2. the function g is the same as f but reflected about the x-axis and reduced by a factor of 200.
3. if x equals your grade
What is the value of g to one decimal place?
Why is it true that a line perpendicular to y= 4x-3 would have the slope of -1/4??