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Mathematics
Sum of n terms of an ap
Find the sum of all two-digit odd positive numbers.

Mathematics
Sum of n terms of an ap
Find the sum of the first 40 positive integers divisible by 6.

Mathematics
Sum of n terms of an ap
What is the sum of the first 10 positive integers?
Mathematics
Sum of n terms of an ap
If $\dfrac{\left( 5+9+13+...n\text{ terms} \right)}{\left( 7+9+11+...12\text{ terms} \right)}=\dfrac{5}{12}$, then n equals?
(a) 5
(b) 6
(c) 9
(d) 12

Mathematics
Sum of n terms of an ap
If the sum of the 10 terms of an A.P. is 4 times tp the sum of its 5 terms, then the ratio of the first term and common difference is
1). 1: 2
2). 2: 1
3). 2: 3
4). 3: 2

Mathematics
Sum of n terms of an ap
The sum of all two digit numbers which when divided by 4 leaves remainder 1 is
Mathematics
Sum of n terms of an ap
What is the sum of all 3 digit numbers that leave a remainder of ‘2’ when divided by 3?
(a) 530,820
(b) 179,587
(c) 560,758
(d) 164,850

Mathematics
Sum of n terms of an ap
If the sum of first (p terms) of an AP is q and if the sum of the first q term of an $\text{AP}=\text{p}$. Show that
Sum $\left( \text{p}+\text{q} \right)$ term is -$\left[ \left( \text{p}+\text{q} \right) \right]$

Mathematics
Sum of n terms of an ap
The sum of integers from 1 to 100 which are divisible by 2 or 5 is-
a) 300
b) 3050
c) 3200
d) 3250

Mathematics
Sum of n terms of an ap
The sum of the latter half of first $200$ terms of an A.P. whose first term and common difference both are positive is equal to one-third of the sum of the first $k$ terms of the same A.P., then the value of $k$ is
(A) $100$
(B) $250$
(C) $300$
(D) $350$

Mathematics
Sum of n terms of an ap
What is the average of the first 20 multiples of 3?

Mathematics
Sum of n terms of an ap
If the sum of the first $2n$ terms of the AP $2,5,8...$ is equal to the sum of the first $n$ terms of AP $57,59,61....$, then $n$ is equal to
A. $10$
B. $12$
C. $11$
D. $13$
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