# 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 31^{st} term of the sequence: 1, 4, 7, 10, …. ?

(A) 90

(B) 91

(C) 92

(D) 93

5. What is the 11^{th} term of the sequence:

(A) m+n

(B) m–n

(C) m+6n

(D) m+8n

**Answers**

**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 11^{th} term of the sequence: 1, 3, 9, 27, …. ?

(A) 2^{8}

(B) 2^{10}

(C) 3^{8}

(D) 3^{10}

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

**Answers**

**6. C**

**7. A**

**8. D**

**9. C**

**10. B**