# Quiz Discussion

What is the sum of the following series? -64, -66, -68, ......, -100

Course Name: Quantitative Aptitude

• 1] -1458
• 2] -1558
• 3] -1568
• 4] -1664
##### Solution
No Solution Present Yet

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# Quiz
1
Discuss

A bacteria gives birth to two new bacteria in each second and the life span of each bacteria is 5 seconds. The process of the reproduction is continuous until the death of the bacteria. initially there is one newly born bacteria at time t = 0, the find the total number of live bacteria just after 10 seconds :

• 1]

$$\frac{{{3^{10}}}}{2}$$

• 2]

310 - 210

• 3]

243 × (35 -1)

• 4]

310 - 25

• 5]

None of these

##### Solution
2
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
3
Discuss

The 2nd and 8th term of an arithmetic progression are 17 and -1 respectively. What is the 14th term?

• 1]

-19

• 2]

-22

• 3]

-20

• 4]

-25

##### Solution
4
Discuss

The sum of first five multiples of 3 is:

• 1]

90

• 2]

72

• 3]

55

• 4]

45

##### Solution
5
Discuss

What is the sum of the first 12 terms of an arithmetic progression if the 3rd term is -13 and the 6th term is -4?

• 1]

-30

• 2]

41

• 3]

-23

• 4]

-34

##### Solution
6
Discuss

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

• 1] -45
• 2] -55
• 3] -50
• 4] 0
##### Solution
7
Discuss

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

• 1]

6

• 2]

7

• 3]

20

• 4]

28

##### Solution
8
Discuss

If the fifth term of a GP is 81 and first term is 16, what will be the 4th term of the GP?

• 1] 36
• 2] 18
• 3] 54
• 4] 24
• 5] 27
##### Solution
9
Discuss

If 18, a, b - 3 are in A.P. then a + b =

• 1] 19
• 2] 7
• 3] 11
• 4] 15
##### Solution
10
Discuss

A boy agrees to work at the rate of one rupee on the first day, two rupees on the second day, and four rupees on third day and so on. How much will the boy get if he started working on the 1st of February and finishes on the 20th of February?

• 1] 220
• 2] 220 -1
• 3] 219 -1
• 4] 219
• 5] None of these
# Quiz