Elective Mathematics

Question 1

1The first term of an AP is 6 and the 10th term is 42. Find the common difference.

Medium

A. 5 B. 3 C. 36 D. 4

Question 2

2The arithmetic mean of a and b is (a + b)/2.

Easy

A. True B. False

Question 3

3In an AP the difference between consecutive terms is constant.

Easy

A. True B. False

Question 4

4Find the 16th term of the AP 4, 6, 8, …

Easy

A. 32 B. 34 C. 36 D. 64

Question 5

5Find the sum of the first 4 terms of the GP 3, 9, 27, …

Medium

A. 243 B. 120 C. 61.5 D. 36

Question 6

6The sum of the first n terms of an AP is

Easy

A. a + (n − 1)d B. n(a + d) C. n/2 [2a + (n − 1)d] D. a(rⁿ − 1)/(r − 1)

Question 7

7The 6th term of the AP 2, 7, 12, … is ___

Easy

Your answer (fill in the blank)

Question 8

8The first term of an AP is 8 and the 10th term is 71. Find the common difference.

Medium

A. 6 B. 7 C. 8 D. 63

Question 9

9The sequence 2, 4, 8, 16 is an AP.

Easy

A. True B. False

Question 10

10Find the sum to infinity of the GP 4, 2, 1, …

Medium

A. 2.67 B. 4 C. 2 D. 8