NCERT Mathematics Class 10 Exemplar Ch 5 Arithmetic Progressions Part 1
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EXERCISE 5.1
1. In an AP, if , then a is
(A) 6 (B) 7
(C) 20 (D) 28
Answer: D
2. In an AP, if , , , then a will be
(A) 0 (B) 3.5
(C) 103.5 (D) 104.5
Answer: B
3. The list of numbers ... is
(A) an AP with (B) an AP with d = 4
(C) an AP with (D) not an AP
Answer: B
4. The 11th term of the AP: , ...is
(A) –20 (B) 20
(C) –30 (D) 30
Answer: B
5. The first four terms of an AP, whose first term is –2 and the common difference is –2, are
(A) (B)
(C) (D)
Answer: C
6. The 21st term of the AP whose first two terms are –3 and 4 is
(A) 17 (B) 137
(C) 143 (D) –143
Answer: B
7. If the 2nd term of an AP is 13 and the 5th term is 25, what is its 7th term?
(A) 30 (B) 33
(C) 37 (D) 38
Answer: B
8. Which term of the ... is 210?
(A) 9th (B) 10th
(C) 11th (D) 12th
Answer: B
9. If the common difference of an AP is 5, then what is ?
(A) 5 (B) 20
(C) 25 (D) 30
Answer: C
10. What is the common difference of an AP in which ?
(A) 8 (B) – 8
(C) – 4 (D) 4
Answer: A