Tub's total capacity = 12 gallon. Question dictates Tub has 3 gallons already filled up. So we have to find out what time it takes to fill up rest 9 gallon (12-3) considering the faucet and drain.

As given for faucet, it takes 1 min to fill up 3 gallons

and it takes 1 min to drain 1.5 gallons.

So within 1 min the tub actually fills 1.5 gallons (3-1.5)

Now 1.5 gallons are filled up in 1 min

1 gallon is filled up in 1/1.5 min

so 9 gallons are filled up in (1/1.5) *9 mins = 6 mins (ANS)

The language Q has the following properties: * ABC is the base word. * If C immediately follows B, then C can be moved to the front of the code word to generate another word. Which one of the following is a code word in language Q?

ক) CAB খ) BCA গ) AA ঘ) ABA

নিজের প্রস্তুতি যাচাই করুন — অ্যাপে লাইভ পরীক্ষা দিয়ে মেরিট লিস্টে নিজের অবস্থান দেখুন।

অ্যাপ ইন্সটল করুন

Fiaz's father has five sons namely Ten, Twenty, thirty and Forty. What is the name of the fifth son?

ক) Fifty খ) Forty Five গ) Hundred ঘ) Fiaz

ব্যাখ্যা (Explanation)

Fiaz father has 5 sons.

4 sons are Ten, Twenty, thirty, forty.

Last the 5th son is Fiaz himself.

If 4y-3x=5, what is the smallest integer value of x for which y >100?

ক) 130 খ) 131 গ) 132 ঘ) 395

ব্যাখ্যা (Explanation)

Given that, 4y-3x = 5

=> y = (5+3x)/4

As per condition in the questions y would be > 100

that means, (5+3x)/4 > 100

=> 5+3x > 400

=> 3x > 395

=> x > 395/3 = 131.66666 ~ 132

So the smallest integer value of x would be 132 for which y >100

If the radius of a sphere is increased by 50%, by what percent will the volume of the sphere the increased?

ক) 50% খ) 125% গ) 150% ঘ) 200%

If two cards are drawn at random from a deck of 52 cards, what is the probability that both the cards will be from the same suit?

ক) 1/13 খ) 2/51 গ) 3/17 ঘ) 1/26

ব্যাখ্যা (Explanation)

Total card =52

Total suit = 4

After drawing first card the remining total card is 51 and remaining total card of same suit is 12.

So probability of getting second card of same suit is 12/51 without replacement. None is the answer.

For an item, if the discount is 30% of his lawn in 25 hours. Mizan, who works twice as fast, then started the remaining work and finished it. How many minutes did Mizan work?

ক) 12.5 খ) 15 গ) 17.5 ঘ) 20

ব্যাখ্যা (Explanation)

MAy be question is not clear or wrong.

Rahim moved 75% of his lawn in 25% hours. Mizan, Who works twice as fast, then started the remaining work and finished it. How many minutes did Mizan work?

ক) 12.5 খ) 15 গ) 17.5 ঘ) 20

ব্যাখ্যা (Explanation)

Hours can not be in %.

What is the measure of the angle formed by the minute and hour hands of a clock at 1 : 50%

ক) 900 খ) 950 গ) 1050 ঘ) 1250

ব্যাখ্যা (Explanation)

Question is not correct.

Because Meena's test turned out to be more difficult than she intended it to be, the teacher decided to adjust the grades by example, if a student missed 25 points, she received a 5 instead of Before the grades were adjusted the class average was M. What was the average after the adjustment, if the total mark of the test is 100?

ক) 50+M/2 খ) 1/2(100-M) গ) 100-M/2 ঘ) 1/2(50+M)

ব্যাখ্যা (Explanation)

Current average = M

Total Mark is 100

So the new average is (100+M)/2 = 50+M/2

Last year Asma bought two paintings. This year she sold them for BDT 2000 each. On one painting, she made 25% profit, and on the other painting she has 25% loss. What was he net loss or profit?

ক) Loss<BDT 100 খ) Profit>BDT 100 গ) Loss>BDT 100 ঘ) No profit-Loss

ব্যাখ্যা (Explanation)

Total loss >BDT 200

In a class, 50% of the male students and 2/3 of the female students speak French. If there are 3/4 as many girls' as boys, What fraction of the entire class speaks French?

ক) 4/7 খ) 3/4 গ) 1/4 ঘ) 2/3

ব্যাখ্যা (Explanation)

Let themale student be 100. Then french speaking males are 50.

Therefore the girls students would be (3/4)*100 = 75 and French speaking girls student would be 75 * (2/3) = 50

Now, Total students = 175

Total french spoken student = 100

so fraction of entire class who speaks french is 100/175 = 4/7

এই টপিকের সব প্রশ্ন ব্যাখ্যাসহ, ভুল-সঠিক-বুকমার্ক আলাদা করে রিভিশন — অ্যাপে।

অ্যাপ ইন্সটল করুন

A student's marks were wrongly entered as 83 instead of Due to this mistake, the average marks of the class got increased by half(5). What is the number of students in the class?

ক) 50 খ) 20 গ) 30 ঘ) 40

সঠিক উত্তর: ০ ভুল উত্তর: ০