**Arithmetic progressions- math quiz**

1. The first four term of an A.P. whose first term is -2 and the common difference is -2, are:

A) -2, -4, -8, -16

B) -2, 4, -8, 16

C) -2, -4, -6, -8

D) -2, 0, 2, 4

B) -2, 4, -8, 16

C) -2, -4, -6, -8

D) -2, 0, 2, 4

…Answer is C)

Solution: -2, -4, -6, -8

2. Which term of A.P. 21, 42, 64, 84,….is 210?

A) 9th

B) 10th

C) 11th

D) 12th

B) 10th

C) 11th

D) 12th

…Answer is B)

Solution: 10th

3. The 21st term of an A.P. whose first two terms are -3 and 4 is:

A) 17

B) 137

C) 143

…Answer is B)

Solution: 137

4. If the common difference of an A.P. is 5,then what is a18 – a13 ?

A) 5

B) 20

C) 25

D) 30

…Answer is C)

Solution: 25

5. If 2nd term of an A.P. is 13 and the 5th term is 25, what is its 7th term ?

A) 30

B) 33

C) 37

D) 38

…Answer is B)

Solution: 33

6. If the first term of an A.P. is -5 and the common difference is 2, then the sum of the first 6 terms is:

A) 0

B) 5

C) 6

D) 15

…Answer is A)

Solution: 0

7. Two A.P’s have the same common difference. the first term of one of these is -1 and that of the other is -8. then the difference between their 4th term is :

A) -1

B) -8

C) 7

D) 15

…Answer is C)

Solution: 7

8. The Famous mathematician associated with finding the sum of the first 100 natural numbers is:

A) Pythagoras

B) Newton

C) Gauss

D) Euclid

…Answer is C )

Solution: Gauss

9. If 7 times the 7th term of A.P. is equal to 11 times the 11th term, then its 18th term will be:

A) 7

B) 11

C) 18

D) 0

… Answer is D )

Solution: 0

10. if 17th term of an A.P. exceeds its 10th term by 14, then the common difference is:

A) 1

B) 2

C) 7

D) 14

…Answer is B)

Solution: b) 2

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