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- Question
Population of a colony of mosquitoes is increasing by 20% per day. If the population on Monday was 3000, on which day of that week the population would be 5184 ?
Options- A. Thursday
- B. Friday
- C. Tuesday
- D. Monday
- Correct Answer
- Thursday
ExplanationGiven monday population = 3000
Per day 20% increase in population.Tuesday population = 3000 + 3000x20/100 = 3000 + 600 = 3600
Wednesday population =3600 + 3600x20/100 = 3600 + 720 = 4320
Thursday population = 4320 + 4320x20/100 = 4320 + 864 = 5184
So that day is Thursday.
- 1. The payment per hour for a daily-wages employee is increased by 33.33 and the working time is reduced by 33.33%. What is the percentage change in the employee's income ?
Options- A. 11.11% decrease
- B. 21.11% increase
- C. 11.11% increase
- D. 21.11% decrease Discuss
- 2. Dot cabs company provides cabs for software employees. The company has 8 Swift dzires, 6 Scorpios, 7 Innovas and few small cars. If Swift dzire makes one fourth of the total fleet, how many small cars are there in the company ?
Options- A. 9
- B. 10
- C. 11
- D. 12 Discuss
- 3. P, Q and R secured 45%, 50% and 60% marks respectively in Biology. M?s marks in Biology is 12.5 more than P?s marks and 4 less than R?s marks. Find out the individual marks of four students. A. For the students, total marks obtained for Biology is 311.5. B. Total of M?s and P?s marks in Biology is 147.5. C. R has obtained 84 marks.
Options- A. Only C
- B. Only A & B
- C. All are required
- D. None of the statements is required Discuss
- 4. The marked price of an article is Rs. 5000. But due to a special festive offer a certain percent of discount is declared. Mr. X availed this oppurtunity and bought the article at reduced price. He then sold it at Rs. 5000 and thereby made a profit of 11 1/9%. The percentage of discount allowed was?
Options- A. 10
- B. 10/3
- C. 15/2
- D. 100/9 Discuss
- 5. There are 1400 students in a school, 25% of those wear spectacles and 2/7 of those wearing spectacles are boys. How many girls in the school wear spectacles?
Options- A. 250
- B. 100
- C. 200
- D. 300 Discuss
- 6. Three strategies P, Q and R have been initiated for cost cutting in a company producing respectively 20%, 30% and 10% savings. Assuming that they operate independently, what is the net saving achieved ?
Options- A. 49.6%
- B. 50.4%
- C. 33.67%
- D. 66.66% Discuss
- 7. An individual deposited 20% of 25% of 30% of what he had into his account with a bank. If he deposited Rs.750, how much was he having initially with him before depositing ?
Options- A. Rs. 38000
- B. Rs. 47000
- C. Rs. 50000
- D. Rs. 35000 Discuss
- 8. Tanks A and B are each in the shape of a right circular cylinder. The interior of tank A has a height of 10 meters and a circumference of 8 meters, and the interior of tank B has a height of 8 meters and a circumference of 10 meters. The capacity of tank A is what percent of the capacity of tank B ?
Options- A. 76%
- B. 72%
- C. 80%
- D. 82% Discuss
- 9. Kalyan purchased a Maruti van for Rs. 1,96,000 and the rate of depreciation is 14(2/7) % per annum. Find the value of the van after two years ?
Options- A. Rs. 1,24,000
- B. Rs. 1,44,000
- C. Rs. 1,32,000
- D. Rs. 1,62,000 Discuss
- 10. A user type a content on 20 sheets, each sheet consist of 55 lines, and each line can have 66 characters. The content is again retyped on another set of sheets, these new sheets have 65 lines and each line can take 70 characters. Calculate the reduction in sheets ?
Options- A. 2 or 60%
- B. 4 or 20%
- C. 6 or 10%
- D. 8 or 5% Discuss
Percentage problems
Search Results
Correct Answer: 11.11% decrease
Explanation:
If earlier he is getting Rs. 1 per hr and working for 1 hr, income = Rs. 1
Now he is getting Rs 1.3333 per hr and working for 0.66667 hrs
Then income for 0.66667 hrs = Rs. 0.8889.
If payment per hr is increased by 33.33 % and working hours dereased by 33.33%, then 11.11 % decrease in income.
Correct Answer: 11
Explanation:
Given the company has 8 SD + 6 SRP + 7 IN = 21 cars + 'x' small cars.
Given SD makes 1/4 th of the total fleet.
=> 8 = 1/4 (21 + x)
=> 32 = 21 + x
=> x = 11
Therefore, the company has 11 small cars.
Correct Answer: None of the statements is required
Explanation:
From the given data,
(60 - 45)% = 12.5 + 4
15% = 16.5
=> 100% = ?
100% = 16.5 x 100/15 = 110
Hence, P = 45% of 110 = 45x110/100 = 49.5
Q = 50% of 110 = 55
R = 60% of 110 = 60 x 110/100 = 66
M = 12.5 + 49.5 = 62 or 66 - 4 = 62
Hence, no statement is required to answer.
Correct Answer: 10
Correct Answer: 250
Correct Answer: 49.6%
Explanation:
As these three strategies P, Q and R are independent so these will cut cost one after the other.
If initial cost is Rs 100, then
20% cost is cut after initializing strategy P, then cost will remain 80% = 80
further 30% cost is cut after strategy Q, then cost will remain 70% of 80 = 56
further 10% cost is cut after strategy R, then cost will remain 90% of 56 = 50.4
Thus final cost remains 50.4 % of the original cost. Hence net saving is 100 - 50.4 = 49.6 %.
Correct Answer: Rs. 50000
Explanation:
Let 'x' be the amount he had in the bank.
=> 20/100(25/100(30/100(x))) = 750
x = 750 x 8000/120 = Rs. 50000
Correct Answer: 80%
Explanation:
circumference of A =
= 8 => so r =
volume =
=
circumference of B =
= 10 => so r =
volume =
=
so ratio of capacities = 160/200 = 0.8
so capacity of A will be 80% of the capacity of B.
Correct Answer: Rs. 1,44,000
Explanation:
Value of Maruti Van, V1 = Rs. 1,96,000
Rate of depreciation, r = 14(2/7)% = 100/7%; Time, t = 2 years
Let V2 is the value after depreciation.
V2 =
V2 = 196000(6/7)(6/7)
V2 = (196000x36)/49 = Rs. 1,44,000.
Correct Answer: 4 or 20%
Explanation:
20 x 55 x 66 = L x 65 x 70
Here L = 72,600/4550 = 15.95 =~ 16
Reduction is 20-16 = 4
which is 20% reduction.
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