In an AP, if \(d=-4\), \(n=7\), \(a_n=4\), then \(a\) is
6
7
20
28
In an AP, if \(a=3.5\), \(d=0\), \(n=101\), then \(a_n\) will be
0
3.5
103.5
104.5
The list of numbers \(-10,-6,-2,2,\ldots\) is
an AP with \(d=-16\)
an AP with \(d=4\)
an AP with \(d=-4\)
not an AP
The 11th term of the AP \(-5,\; -\dfrac{5}{2},\; 0,\; \dfrac{5}{2},\ldots\) is
−20
20
−30
30
The first four terms of an AP with \(a=-2\) and \(d=-2\) are
−2, 0, 2, 4
−2, 4, −8, 16
−2, −4, −6, −8
−2, −4, −8, −16
The 21st term of the AP whose first two terms are \(-3\) and \(4\) is
17
137
143
−143
If the 2nd term of an AP is 13 and the 5th term is 25, what is its 7th term?
30
33
37
38
Which term of the AP \(21,42,63,84,\ldots\) is \(210\)?
9th
10th
11th
12th
If the common difference of an AP is 5, then what is \(a_{18}-a_{13}\)?
5
20
25
30
What is the common difference of an AP in which \(a_{18}-a_{14}=32\)?
8
−8
−4
4
Two APs have the same common difference. The first term of one is \(-1\) and of the other is \(8\). Then the difference between their 4th terms is
−1
−8
7
−9
If \(7\) times the 7th term of an AP is equal to \(11\) times its 11th term, then its 18th term will be
7
11
18
0
The 4th term from the end of the AP: \(-11,-8,-5,\ldots,49\) is
37
40
43
58
The famous mathematician associated with finding the sum of the first 100 natural numbers is
Pythagoras
Newton
Gauss
Euclid
If the first term of an AP is \(-5\) and the common difference is \(2\), then the sum of the first 6 terms is
0
5
6
15
The sum of first 16 terms of the AP: \(10,6,2,\ldots\) is
−320
320
−352
−400
In an AP if \(a=1\), \(a_n=20\) and \(S_n=399\), then \(n\) is
19
21
38
42
The sum of first five multiples of 3 is
45
55
65
75