exam Maths Puzzle Numerical Ability

Write an algebraic expression that proves the difference of the square of any two odd numbers must be divisible by 8.

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exam Other Question

1. A customer wants to make a teepee in his backyard for his children. He plans to use lengths of PVC plumbing pipe for the supports on the teepee, and he wants the teepee to be 12 feet across and 8 feet tall. How long should the PVC plumbing pipe be? y=2.1x+37 where y=percent recycled and x=the year number coded as 1990=1, 1992=3, 1994=5, and 2001=12. 1.) Is the slope positive or negatve? What does the slope tell us about the