Mathematics Questions and Answers – Series

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This set of Mathematics Multiple Choice Questions & Answers (MCQs) focuses on “Series”.

1. The sequence is same as series.
a) True
b) False
View Answer

Answer: b
Explanation: No, sequence and series both are not same. When we use addition between the terms of sequence, it is said to be series.
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2. A series can also be denoted by symbol ____________
a) π an
b) ∑an
c) Φ an
d) θ an
View Answer

Answer: b
Explanation: When we use addition between the terms of sequence, it is said to be series.
We know that addition can also be written in the form of sigma so, series can also be denoted by ∑an.

3. 1+2+3+4 or 10 is a series?
a) 1+2+3+4 only
b) 10 only
c) 1+2+3+4 and 10
d) neither 1+2+3+4 nor 10
View Answer

Answer: a
Explanation: 1+2+3+4 is a finite series of 4 terms.
10 is sum of the terms of this series not a series itself.
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4. Find sum of series 2+3+5+7.
a) 5
b) 10
c) 17
d) infinite
View Answer

Answer: c
Explanation: Sum of the series 2+3+5+7 is finite because given series has finite number of terms. The sum of given 4 terms i.e. 17.

5. Find the sum of first 5 terms of series 2+4+6+………………
a) 14
b) 16
c) 20
d) 30
View Answer

Answer: d
Explanation: Since 2, 4 and 6 all are even numbers so, given series involve all even number terms.
The next two terms will be 8 and 10 so, sum will be 2+4+6+8+10 = 30.
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6. \(\sum_{i=1}^4\) 2n+3 = _____________________
a) 5
b) 12
c) 21
d) 32
View Answer

Answer: d
Explanation: a1 = 2*1+3 = 5, a2 = 2*2+3 = 7, a3 = 2*3+3 = 9, a4 = 2*4+3 = 11.
Sum = 5+7+9+11 = 32.

7. Which of the following is not a series?
a) Arithmetic series
b) Geometric series
c) Isometric series
d) Harmonic series
View Answer

Answer: c
Explanation: The isometric series is not a series. Rest all are series i.e. arithmetic series, geometric series and harmonic series.
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Sanfoundry Global Education & Learning Series – Mathematics – Class 11.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn | Youtube | Instagram | Facebook | Twitter