Online Test | Lucent Black Board | LucentBlackBoard.com

Note:

1. Total number of questions : 15.

2. Time alloted : 20 minutes.

3. Each question carry 1 mark, no negative marks.

4. Click the 'Submit Test' button given in the bottom of this page to Submit your answers.

5. Test will be submitted automatically if the time expired.

6. Don't refresh the page.

Result and Statistics

Time Left :

Result and Statistics ( Test No : online_test_number )

A. Number Of Question

B. Number Of Attempted

C. Number Of Correct Answer

D. Number Of Wrong Answer ( D = B-C )

E. Total Score ( E = C )

F. Accuracy Rate ( F = C / B * 100 )

G. Total Percentage ( G = C / A * 100 )

Feed back Form

Rate This Test :

Comments:

Menu Links

More Online Test
Online Test Menu
Home

In a party there were 8 men, when 2 of these men aged 20 and 24 left the party and 2 women entered the party, the average age of the entire group of 8 increased by 2. What was the average age of the two new women entered the party?

A. 35 Wrong Right

B. 32 Wrong Right

C. 30 Wrong Right

D. 33 Wrong Right

Answer : 30

Explanation : Average age of X1 = ∑X_men / 8 (1)
= ∑X_men = 8X1
Let ages of two women be A, B
∑X _new = ∑X _men – (20 +24) + (A + B)
X1 + 2 = (= ∑X _men – 44 + (A + B)) / 8
Equations (1) and (2) gives:
44/8 – (A + B)/8 = -2
44 – (A +B) = -16
A + B = 60
Average age of women = 60/2 = 30 years

Learn more problems on : Average

Discuss on this question

Workspace

If the banker’s discount on a certain amount of money is Rs.80 and the true discount on the same amount for the same time duration is Rs.64, then the amount due is:

A. 320 Wrong Right

B. 360 Wrong Right

C. 400 Wrong Right

D. None of these Wrong Right

Answer : 320

Explanation :

Learn more problems on : Banker's Discount

Discuss on this question

Workspace

The calendar for the year 2005 is the same as for the year?

A. 2010 Wrong Right

B. 2013 Wrong Right

C. 2012 Wrong Right

D. 2011 Wrong Right

Answer : 2012

Explanation : Count the number of days from 2005 onwards to get 0 odd day.
Year - Odd days
2005 - 1
2006 - 1
2007 - 1
2008 - 2
2010 - 1
2011 - 1
= 7 or 0 odd day
Hence, Calendar for the 2005 is the same as that for the year 2012.

Learn more problems on : Calendar

Discuss on this question

Workspace

Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?

A. 648 Wrong Right

B. 1800 Wrong Right

C. 2700 Wrong Right

D. 2100 Wrong Right

Answer : 1800

Explanation :

Learn more problems on : Chain Rule

Discuss on this question

Workspace

At what time between 4:15 am and 5:05 am will the angle between the hour hand and the minute hand of a clock be the same as the angel between the hands at 8:45 pm?

A. 23 7/11 minutes past 4 o’clock Wrong Right

B. 22 2/11 minutes past 4 o’clock Wrong Right

"/> C. 27 2/11 minutes past 4 o’clock Wrong Right

D. 23 2/11 minutes past 4 o’clock Wrong Right

Answer : 23 2/11 minutes past 4 o’clock

Explanation : We have – θ= 6(40 – 11*45 / 12) = – 30/4. At 8 :45, the angle between the minute hand and the hour hand of the clock will be 30/4°. This is the same as the required angle.
Therefore ±30/4 = 6(20 – 11m/12).
On solving, m=20 m 5/11 minutes or 23 2/11 minutes past 4 o’clock

Learn more problems on : Clock

Discuss on this question

Workspace

A person borrowed Rs. 10000 at 10% rate of compound interest. He repaid certain amount at the end of the first year. Then he paid Rs. 5500 at the end of the second year thereby discharging the loan completely. What amount did he repay at the end of the first year?

A. Rs.5500 Wrong Right

B. Rs. 6600 Wrong Right

C. Rs. 5750 Wrong Right

D. Rs. 6000 Wrong Right

Answer : Rs. 6000

Explanation : The amount of Rs. 10000 borrowed at 19% rate will become 11000 at the end of the first year. At this point a certain amount was repaid and let the amount be repaid Rs. A. Principal for 2nd year = Rs. (1100 – A). At 10% rate of interest, this will amount to (1100 – A) × 1.1 at the end of 2nd year. But by repaying Rs. 5500, the loan has been discharged completely.
∴ (1100 – A) × 1.1 = 5500
∴ 1100 – A = 55000/11 = 5000
∴ A = Rs. 6000
∴ The amount repaid at the end of 1st year = Rs. 6000

Learn more problems on : Compound Interest

Discuss on this question

Workspace

832.58 – 242.31 = 779.84 - ?

A. 179.57 Wrong Right

B. 199.57 Wrong Right

C. 295.05 Wrong Right

D. None of these Wrong Right

Answer : None of these

Explanation : Let 832.58 – 242.31 = 779.84 – x
Then x = (779.84 + 241.31) -832.58 = 1022.15 – 832.58 = 189.57

Learn more problems on : Decimal Fraction

Discuss on this question

Workspace

A and B started a business in partnership investing Rs. 20,000 and Rs. 15,000 respectively. After six months, C joined them with Rs. 20,000. What will be B's share in total profit of Rs. 25,000 earned at the end of 2 years from the starting of the business?

A. Rs. 7500 Wrong Right

B. Rs. 9000 Wrong Right

C. Rs. 9500 Wrong Right

D. Rs. 10,000 Wrong Right

Answer : Rs. 7500

Explanation : A : B : C = (20,000 x 24) : (15,000 x 24) : (20,000 x 18) = 4 : 3 : 3.
B's share = Rs. 25000 x (3/10) = Rs. 7,500.

Learn more problems on : Partnership

Discuss on this question

Workspace

If the population of a city increases by 5 % annually, what will be the population of the city in 2 years time if its current population is 78000?

A. 81900 Wrong Right

B. 85995 Wrong Right

C. 85800 Wrong Right

D. 90000 Wrong Right

Answer : 85995

Explanation : The % change in population of city in two years time is 1.05*1.05 = 1.1025 = 10.25%
Therefore, after 2 years the population of the city will be 1.1025 * 78000 = 85995

Learn more problems on : Percentage

Discuss on this question

Workspace

10.

Two pipes A and B can fill a tank in 15 minutes and 20 minutes respectively. Both the pipes are opened together but after 4 minutes, pipe A is turned off. What is the total time required to fill the tank?

A. 10 min. 20 sec. Wrong Right

B. 11 min. 45 sec Wrong Right

C. 12 min. 30 sec. Wrong Right

D. 14 min. 40 sec. Wrong Right

Answer : 14 min. 40 sec.

Explanation :

Learn more problems on : Pipes and Cistern

Discuss on this question

Workspace

11.

A man is 24 years older than his son. In two years, his age will be twice the age of his son. The present age of his son is:

A. 14 years Wrong Right

B. 18 years Wrong Right

C. 20 years Wrong Right

D. 22 years Wrong Right

Answer : 22 years

Explanation : Let the son's present age be x years. Then, man's present age = (x + 24) years.
(x + 24) + 2 = 2(x + 2)
x + 26 = 2x + 4
x = 22.

Learn more problems on : Problems on Ages

Discuss on this question

Workspace

12.

Two trains start at the same time, one from A to B and the other from B to A. if they arrive at B and A respectively 5 hours and 20 hours after they passed each other, what is the ratio of speeds of the train starting from A and that of the one starting from B?

A. 4:3 Wrong Right

B. 1: 2 Wrong Right

C. 2:1 Wrong Right

D. 3:1 Wrong Right

Answer : 2:1

Explanation : S1/S2 = √t1 / √t2
=> S1/S2 = √20 / √5 = √4 / 1
=> 2/1
One train travels twice as fast as the other

Learn more problems on : Problems on Trains

Discuss on this question

Workspace

13.

A cloth merchant makes an advertisement that he will take only 1.5% profit during the Diwali sale. After the sale he actually made a profit of 12% by using a faulty meter rod. What was the length of the meter rod used by the merchant?

A. 0.92025 m Wrong Right

B. 0.9525 m Wrong Right

C. 0.90625 m Wrong Right

D. 0.98075 m Wrong Right

Answer : 0.90625 m

Explanation : Let g: - be the gain or loss in total transaction
x: - gain or loss on cost price
(100 + g) / (100 + x) = True measure / Faulty measure
In the above problem, g = 12%
x = 1.5%
Therefore, (100 + 12) / (100 + 1.5) = 1/ y
112 / 101.5 = 1/ y; y = 101.5 / 112
y = 0.90625 m

Learn more problems on : Profit and Loss

Discuss on this question

Workspace

14.

If 35 + 125 = 17.88, then what will be the value of 80 + 65 ?

A. 13.41 Wrong Right

B. 20.46 Wrong Right

C. 21.66 Wrong Right

D. 22.35 Wrong Right

Answer : 22.35

Explanation : 35 + 125 = 17.88
35 + 25 x 5 = 17.88
35 + 55 = 17.88
85 = 17.88
5 = 2.235
80 + 65 = 16 x 5 + 65
= 45 + 65
= 105 = (10 x 2.235) = 22.35

Learn more problems on : Square Root and Cube Root

Discuss on this question

Workspace

15.

If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20 boys in doing the same type of work will be:

A. 4 days Wrong Right

B. 5 days Wrong Right

C. 6 days Wrong Right

D. 7 days Wrong Right

Answer : 4 days

Explanation :

Learn more problems on : Time and Work

Discuss on this question

Workspace

LucentBlackBoard.com has the web's largest collection of over 15,000 aptitude questions and answers with detailed explanation which include subjects like Arithmetic Aptitude, Logical Reasoning, Verbal Ability, General Knowledge, Programming Skills and more!

Our online education portal provides a unique and standard learning experience for students. We enable the students to prepare for most of the entrance and competitive exams like MBA (MAT, GMAT), Engineering (IIT-JEE, AIEEE, GATE), Employment (IAS, Bank PO, Railway, UGCNET), Civil Services and many more. We bring you the best in education by providing technical excellence and creating innovative solutions. We provide facility for online test preparation that offers 24/7 access to relevant subject matter and relative tests. These test preparations help the students to groom themselves and get prepared before actually facing the examination.