The famous mathematician associated with finding the sum of the first 100 natu- ral numbers is
(A) Pythagoras (B) Newton (C) Gauss (D) Euclid
The 4th term from the end of the AP: –11, –8, –5, …, 49 is
(A) 37 (B) 40 (C) 43 (D) 58
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
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
What is the common difference of an AP in which a18 – a14 = 32?
(A) 8 (B) – 8 (C) – 4 (D) 4
If the common difference of an AP is 5, then what is a18 – a13
(A) 5 (B) 20 (C) 25 (D) 30
Which term of the AP: 21, 42, 63, 84,… is 210?
(A) 9th (B) 10th (C) 11th (D) 12th
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
The 21st term of the AP whose first two terms are –3 and 4 is
(A) 17 (B) 137 (C) 143 (D) –143