EDGE Math 8

Use either inductive or deductive reasoning to solve each problem. Choose the correct answer.

1.	What is the sum of the first 20 odd numbers?

400

600

800

None of the choices

Answer: 400

2.	If 5 points on a circle are joined by as many line segments as possible, how many nonoverlapping regions will the segments form with the circle?

None of the choices

Answer: None of the choices; 16

3.	Study the pattern in the set of figures below. If the pattern will continue, how many tiles will the nth figure have?

4 n - 3

n + 4

2 n + 1

None of the choices

Answer: $4 n - 3$

4.	Ten teams participated in a basketball intramural. If each team played with each of the other teams twice, how many games were played?

200

None of the choices

Answer: 90

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