# NCERT Mathematics Class 10 Exemplar Ch 5 Arithmetic Progressions Part 2

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11. Two APs 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 terms is

(A) –1 (B) – 8

(C) 7 (D) –9

12. If 7 times the 7th term of an AP is equal to 11 times its 11th term, then its 18th term will be

(A) 7 (B) 11

(C) 18 (D) 0

13. The 4th term from the end of the AP: is

(A) 37 (B) 40

(C) 43 (D) 58

14. The famous mathematician associated with finding the sum of the first 100 natural numbers is

(A) Pythagoras (B) Newton

(C) Gauss (D) Euclid

15. If the first term of an AP 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

16. The sum of first 16 terms of the is

(A) –320 (B) 320

(C) –352 (D) –400

17. In an AP if , and , then n is

(A) 19 (B) 21

(C) 38 (D) 42