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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