Geometric Series Quiz 18 (10 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. What will this formula tell us?

Correct Answer: C) The sum of a convergent geometric series.

2. Which kind of sequence has a common ratio?

Correct Answer: B) Geometric.

3. Find a$_{1}$ in a geometric series for which the sum of the first six terms is-728 and the common ratio is 3.

Correct Answer: A) -2.

4. Find the sum of the first 4 terms of a geometric series if the first term is 1 and the common ratio is 3.

Correct Answer: C) 40.

5. $1,\-2,\ 4,\-8,\ ..... \ \ Find\ a_{11}$

Correct Answer: C) $1024$.

6. $a_1=3,\ \ \ r=5,\ \ \ n=7$

Correct Answer: A) $58,593$.

7. Which of the following is an everyday example of geometric decay?

Correct Answer: B) Depreciation of a new car's value by a constant percentage each year.

8. Is the sequence 2, 4, 12, 48, ..... geometric?

Correct Answer: B) No.

9. Find the sum of the n terms when a$_{1}$=4, r =-5 and n = 4

Correct Answer: B) -416.

10. What comes next in the series: 100, 50, 25, 12.5,?

Correct Answer: A) 6.25.