Quiz Discussion

What is the sum of the first 17 terms of an arithmetic progression if the first term is -20 and last term is 28?

Course Name: Quantitative Aptitude

• 1] 68
• 2] 156
• 3] 142
• 4] 242
Solution
No Solution Present Yet

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# Quiz
1
Discuss

How many terms are there in 20, 25, 30 . . . . . . 140?

• 1] 22
• 2] 25
• 3] 23
• 4] 24
Solution
2
Discuss

If the sum of the series 2 + 5 + 8 + 11 … is 60100, then the number of terms are

• 1]

100

• 2]

150

• 3]

200

• 4]

250

Solution
3
Discuss

Sum of n terms of the series $$\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} +$$ ....... is

• 1]

$$\frac{{n\left( {n + 1} \right)}}{2}$$

• 2]

$$2n\left( {n + 1} \right)$$

• 3]

$$\frac{{n\left( {n + 1} \right)}}{{\sqrt 2 }}$$

• 4]

1

Solution
4
Discuss

If three numbers be in G.P., then their logarithms will be in

• 1]

AP

• 2]

GP

• 3]

HP

• 4]

None Of This

Solution
5
Discuss

Find the 15th term of the sequence 20, 15, 10 . . . . .

• 1] -45
• 2] -55
• 3] -50
• 4] 0
Solution
6
Discuss

The first and last term of an A.P. is a and l respectively. If S is the sum of all the terms of the A.P. and the common difference is given by $$\frac{{{l^2} - {a^2}}}{{k - \left( {l + a} \right)}}$$   then k = ?

• 1] S
• 2] 2S
• 3] 3S
• 4] None of these
Solution
7
Discuss

The first term of an Arithmetic Progression is 22 and the last term is -11. If the sum is 66, the number of terms in the sequence are:

• 1]

9

• 2]

10

• 3]

11

• 4]

12

Solution
8
Discuss

The nth term of an A.P., the sum of whose n terms is Sn, is

• 1] Sn + Sn - 1
• 2] Sn - Sn - 1
• 3] Sn + Sn + 1
• 4] Sn - Sn + 1
Solution
9
Discuss

The sum of the first and third term of an arithmetic progression is 12 and the product of first and second term is 24, then first term is

• 1]

4

• 2]

1

• 3]

8

• 4]

6

Solution
10
Discuss

In an A.P., if d = -4, n = 7, an = 4, then a is

• 1] 6
• 2] 7
• 3] 20
• 4] 28
# Quiz