# ECAT – Mathematics (Sequence & Series)

Sequence & Series Multiple Choice Questions, the following sample questions are from basics of Sequence & Series at intermediate level.

## Sequence & Series Sample Questions

1. What comes next in the sequence: 1, 2, 6, 22, ____ ?
(A) 82
(B) 84
(C) 86
(D) 88

3. What is the sum of the sequence

(A) 36
(B) 37
(C) 38
(D) 39

4. What is the 31st term of the sequence: 1, 4, 7, 10, …. ?
(A) 90
(B) 91
(C) 92
(D) 93

5. What is the 11th term of the sequence: $m-2n,m-n,m,...?$
(A) m+n
(B) m–n
(C) m+6n
(D) m+8n

1. C
2. C
3. D
4. B
5. D

6. What is the sum of the sequence: 10, 20, 30, …., 1000 ?
(A) 50,000
(B) 50,250
(C) 50,500
(D) 50,750

7. What is the sum of the sequence: 1, 10, 100, 1000, … 1,000,000,000 ?
(A) 11,111,111,11
(B) 11,111,111,90
(C) 99,999,999,11
(D) 99,999,999,99

8. what is the 11th term of the sequence: 1, 3, 9, 27, …. ?
(A) 28
(B) 210
(C) 38
(D) 310

9. What is the sum of the first 100 natural numbers?
(A) 5,000
(B) 5,025
(C) 5,050
(D) 5,100

10. What is the sum of the first 100 odd numbers?
(A) 9,000
(B) 10,000
(C) 11,000
(D) 12,000