## Multiple choice questions on arithmetic progression

Q1. In an AP, if d = –4, n = 7, a_{n} = 4, then a is

(A) 6

(B) 7

(C) 20

(D) 28

**Answer: (D)**

Q2. **In an Arithmetic Progression, if a = 28, d = -4, n = 7, then a _{n} is:**

(a) 4

(b) 5

(c) 3

(d) 7

Answer: **(a) 4**

Q3. If p, q, r and s are in A.P. then r – q is

(a) s – p

(b) s – q

(c) s – r

(d) none of these

Answer: c

Q4. 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)**

Q5. ** If a = 10 and d = 10, then first four terms will be:**

(a) 10, 30, 50, 60

(b) 10, 20, 30, 40

(c) 10, 15, 20, 25

(d) 10, 18, 20, 30

Answer:** (b) 10, 20, 30, 40**

Q6. 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)**

Q7. **30th term of the A.P: 10, 7, 4, …, is**

(a) 97

(b) 77

(c) -77

(d) -87

Answer: **(c) -77**

Q8. **The missing terms in AP: __, 13, __, 3 are:**

(a) 11 and 9

(b) 17 and 9

(c) 18 and 8

(d) 18 and 9

Answer: **(c)**

Q9. **Which term of the A.P. 3, 8, 13, 18, … is 78?**

(a) 12th

(b) 13th

(c) 15th

(d) 16th

Answer:** (d) 16th**

Q10. **The 21st term of AP whose first two terms are -3 and 4 is:**

(a) 17

(b) 137

(c) 143

(d) -143

Answer:** (b) 137**

see also: Maths Olympiad