Elective Mathematics

Question 1

1Σ_{r=1}^{n} c = nc for a constant c.

Easy

A. True B. False

Question 2

2The sum of the first n natural numbers is n(n + 1)/2.

Easy

A. True B. False

Question 3

3Σ r from r = 1 to 3 = ___

Easy

Your answer (fill in the blank)

Question 4

4Evaluate Σ r from r = 1 to 10.

Easy

A. 55 B. 385 C. 100 D. 110

Question 5

5Evaluate Σ r² from r = 1 to 12.

Medium

A. 650 B. 6,084 C. 78 D. 1,728

Question 6

6Σ r³ = (Σ r)².

Hard

A. True B. False

Question 7

7Evaluate Σ r from r = 1 to 5.

Easy

A. 55 B. 30 C. 25 D. 15

Question 8

8Evaluate Σ r from r = 1 to 4.

Easy

A. 10 B. 20 C. 16 D. 30

Question 9

9Evaluate Σ r² from r = 1 to 8.

Medium

A. 36 B. 1,296 C. 512 D. 204

Question 10

10Evaluate Σ r³ from r = 1 to 7.

Hard

A. 784 B. 2,401 C. 28 D. 140