Q. If the first term of a geometric progression is 7 and the common ratio is 1/2, what is the sum of the first 5 terms?
A.
14
B.
21
C.
28
D.
35
Solution
The sum of the first n terms of a GP is given by S_n = a(1 - r^n) / (1 - r). Here, S_5 = 7(1 - (1/2)^5) / (1 - 1/2) = 7(1 - 1/32) / (1/2) = 7 * 31/32 * 2 = 14.
Q. If the first term of a geometric progression is x and the common ratio is 1/2, what is the sum of the first 5 terms?
A.
x
B.
x/2
C.
x/3
D.
x(1 - (1/2)^5)/(1 - 1/2)
Solution
The sum of the first n terms of a GP is given by S_n = a(1 - r^n) / (1 - r). Here, S_5 = x(1 - (1/2)^5) / (1 - 1/2) = x(1 - 1/32) / (1/2) = x(31/32) * 2 = x(62/32).
Q. If the first term of a GP is 10 and the common ratio is 0.5, what is the sum of the first 5 terms?
A.
15
B.
20
C.
25
D.
30
Solution
The sum of the first n terms of a GP is given by S_n = a(1 - r^n) / (1 - r). Here, S_5 = 10(1 - 0.5^5) / (1 - 0.5) = 10(1 - 0.03125) / 0.5 = 10 * 0.96875 / 0.5 = 19.375, which rounds to 20.
Q. If the first term of a harmonic progression is 1 and the common difference of the corresponding arithmetic progression is 1, what is the second term?
A.
1/2
B.
1/3
C.
1/4
D.
1/5
Solution
The first term is 1, and the reciprocal of the second term in HP is 1 + 1 = 2. Therefore, the second term is 1/2.
Q. If the first term of a harmonic progression is 1 and the common difference of the corresponding arithmetic progression is 2, what is the second term of the harmonic progression?
A.
1/2
B.
1/3
C.
1/4
D.
1/5
Solution
The first term is 1, and the second term's reciprocal will be 1 + 2 = 3. Therefore, the second term is 1/3.
Q. If the first term of a harmonic progression is 1 and the common difference of the corresponding arithmetic progression is 1, what is the second term of the harmonic progression?
A.
1/2
B.
1/3
C.
1/4
D.
1/5
Solution
The first term is 1, and the second term's reciprocal will be 1 + 1 = 2, so the second term is 1/2.
Q. If the first term of a harmonic progression is 1 and the second term is 1/2, what is the common difference of the corresponding arithmetic progression?
A.
1/2
B.
1/4
C.
1/3
D.
1
Solution
The reciprocals are 1 and 2, which have a common difference of 1.
Q. If the first term of a harmonic progression is 3 and the second term is 6, what is the common difference of the corresponding arithmetic progression?
A.
1
B.
2
C.
3
D.
4
Solution
The reciprocals are 1/3 and 1/6. The common difference is (1/6 - 1/3) = -1/6, which corresponds to a common difference of 1 in the arithmetic progression.
Q. If the first term of a harmonic progression is 4 and the common difference of the corresponding arithmetic progression is 2, what is the second term?
A.
2
B.
3
C.
4
D.
5
Solution
The first term is 4, and the reciprocal is 1/4. The second term's reciprocal will be 1/4 + 2 = 9/4, so the second term is 4/9.
Q. If the first term of a harmonic progression is 5 and the common difference of the corresponding arithmetic progression is 2, what is the second term?
A.
2
B.
3
C.
4
D.
6
Solution
The first term in the arithmetic progression is 1/5, and the common difference is 2. Therefore, the second term in the harmonic progression is 1/(1/5 + 2) = 1/(2.2) = 5/11.
Q. If the first term of a harmonic progression is 5 and the common difference of the corresponding arithmetic progression is 2, what is the second term of the harmonic progression?
A.
2.5
B.
3.33
C.
4
D.
6
Solution
The first term is 5, and the second term's reciprocal is 1/5 + 2 = 1/5 + 2/1 = 11/5. Therefore, the second term is 5/11, which is approximately 0.45.
Q. If the first term of a harmonic progression is 5 and the second term is 10, what is the fourth term?
A.
15
B.
20
C.
25
D.
30
Solution
The reciprocals are 1/5 and 1/10. The common difference is -1/10. The fourth term's reciprocal will be 1/10 - 1/10 = 1/25, hence the fourth term is 25.
Q. If the first term of a harmonic progression is 5 and the second term is 10, what is the sum of the first three terms?
A.
15
B.
20
C.
25
D.
30
Solution
The first term is 5, the second term is 10, and the third term can be calculated as 1/(1/5 + 1/10) = 3.33. The sum is 5 + 10 + 3.33 = 18.33, which rounds to 20.
Algebra is a fundamental branch of mathematics that plays a crucial role in various school and competitive exams. Mastering algebraic concepts not only enhances problem-solving skills but also boosts confidence during exams. Practicing MCQs and objective questions is essential for reinforcing your understanding and identifying important questions that frequently appear in exams.
What You Will Practise Here
Basic algebraic operations and their properties
Linear equations and inequalities
Quadratic equations and their solutions
Polynomials and their applications
Functions and their graphs
Exponents and logarithms
Word problems involving algebraic expressions
Exam Relevance
Algebra is a significant topic in the CBSE curriculum and is also relevant for State Boards, NEET, and JEE exams. Students can expect questions that test their understanding of algebraic concepts through various formats, including multiple-choice questions, fill-in-the-blanks, and problem-solving scenarios. Common question patterns include solving equations, simplifying expressions, and applying algebra to real-life situations.
Common Mistakes Students Make
Misinterpreting word problems and failing to translate them into algebraic equations
Overlooking signs when solving equations, leading to incorrect answers
Confusing the properties of exponents and logarithms
Neglecting to check their solutions, resulting in errors
Rushing through calculations without verifying each step
FAQs
Question: What are some effective ways to prepare for Algebra MCQs? Answer: Regular practice with a variety of MCQs, reviewing key concepts, and understanding common mistakes can greatly enhance your preparation.
Question: How can I improve my speed in solving Algebra objective questions? Answer: Time yourself while practicing and focus on solving simpler problems quickly to build confidence and speed.
Don't wait any longer! Start solving practice MCQs today to test your understanding of algebra and prepare effectively for your exams. Your success in mastering algebra is just a few practice questions away!
Soulshift Feedback×
On a scale of 0–10, how likely are you to recommend
The Soulshift Academy?