137.5 mph
133.33 mph
120 mph
125 mph
প্রশ্নঃ A train went 300 miles from City X to City Y at an average speed of 80 mph. At what speed did it travel on the way back if its average speed for the whole trip was 100 mph?
বর্ণনাঃ
total time = time of leg one plus time of leg two = 6 hours and time of leg one = 300 miles / 80mph = 3.75 hours, so:
6 = time of leg one + 3.75, therefore time of leg one = 2.25.
speed during leg two = distance of leg two divided by time = 300 miles / 2.25 = 133.3mph
1 : 00 pm
12 : 00 pm
11 : 42 am
11 : 30 am
প্রশ্নঃ It takes Russel 20 minutes to inspect a car and Sohel needs 18 minutes to inspect a car. They both start inspecting cars separately at 10:00 am. At certain points of time, both of them will finish inspecting a car at the same time. When will this occur for the first time?
বর্ণনাঃ
We need to find the LCM of 18 and 20 in order to get the time interval when they both end inspection simultaneously. LCM of 18 and 20 is 180.
That means after 180 min, they both end their respective inspection simultaneously. As they started at 10 AM, so after 180 min 0r 3 hr, the time will be 1:00 PM.
Marina
Drabir
Lima
Robin
প্রশ্নঃ Alam weighs twice as much as much as Marina. Marina's weight is 60% of Robin's weight. Drabir weight 50% of Lima's weight. Lima weight 190% of Alam's weight. Which of these 5 people weight the least?
বর্ণনাঃ
Alam= 2 Marina
Marina= 3Robin/5
Robin = 5 Marina /3 Lima= 1.9 Alam= 3.8 Marina
Drabir= Lima/2= 1.9 Marina
Therefore, Marina weights the least.b
84
66
60
54
প্রশ্নঃ In a class of 120 students. 60 percent can speak English and the rest can speak only Bengali. If 25 percent of those in the class who can speak English can also speak Bengali, how many of the students in the class can speak Bengali?
বর্ণনাঃ
We notice that
120×0.6= 72 students can speak English
120-72= 48 can speak only Bengali
73× 0.25= 18 can speak both English and Bengali
48+18= 66 can speak Bengali
2 and 3 only
1 and 3 only
3 only
1 only
প্রশ্নঃ If X is an odd integer and Y is an even integer, which of the following statements is (are) always true? 1. X+Y is odd 2. XY is odd 3. 2X+Y is even
বর্ণনাঃ
প্রশ্নে বলা হয়েছে, যদি x বিজোড় সংখ্যা এবং y জোড় সংখ্যা হয় তবে নিচের কোনটি সত্য?
ব্যাখ্যাঃ আমরা জানি যে, একটি জোড় সংখ্যা ও একটি বিজোড় সংখ্যা যোগফল এবং বিয়োগফল সবসময় বিজোড় সংখ্যা হবে। আবার তাদের গুনফল সবসময় জোড় সংখ্যা হয়।তাহলে,
x+y or x-y → বিজোড়
x*y →জোড়
774,000
756,000
144,000
72,000
প্রশ্নঃ In a group of people solicited by a charity, 30% contributed Tk. 2400 each, 45% contributed Tk. 1200 each, and the rest contributed Tk. 120 each. If the charity received a total of Tk. 18,000 form the people who contributed Tk. 120.00, how much was contributed by the entire group?
বর্ণনাঃ
Percent of people’s who is given by Tk.120 = 100-30-45=25%
Number of peoples who is given by Tk. 120 = 18,000/120= 150
Now, 25% of people’s =150
So, Total number of people’s =(150*100/25)=600
Total contribution = (600*0.3*2,400)+(600*0.45*1,200)+18,000= 774,000 Tk.
Ans: 774,000 Tk.
increases by 10%
Stay the same
decreased by 4%
decreased by 20%
প্রশ্নঃ If the length of a rectangle is increased by 20% and the width is decreased by 20%, the area is :
বর্ণনাঃ
We can let L= the original length
and W= the original width
Thus, the original area of the rectangular is LW and the new area is 1.2L× 0.8W= 0.96LW
So, the area is decreased by 4%
3200
3100
3000
2500
প্রশ্নঃ A Company makes a profit 6% on its first Tk. 10,000 of sales day and 5% an all sales in excess of Tk. 10,000 for that day. How much profit will the company make in a day when sales are Tk. 16,000?
বর্ণনাঃ
Profit on first 10,000Tk. = 6*10000/100 = 600 Tk.
Profit on the rest of 60,000 Tk. that is,
Profit on 50,000 Tk. = 5*50000/100 = 2500 Tk.
Total Profit = ( 2500 + 600 ) Tk. = 3100 Tk.
7.00%
6.70
6.39%
6.50%
revealing
modern
superior
demanding
diversion
deviation
obstruction
alienation
unreasonable
impossible
intolerable
unimaginable
hopeful
enchanted
enamoured
jealous
defamation
fluctuation
characterization
hallucination
resolving inconsistency
lacking similarityt
repetitive
unremarkable
lighten
loosen
worsen
shorten
drain
erupt
exit
decelerate
pronounced interest
intense discussion
speedy resolution
increased activity
To detect bad smell
To misunderstand
To suspect a trick or deceit
To see hidden meaning
To take risk
To hazard one self
To do a task secretly
To do hazardous thing without any idea of the result
Romantic designs
Ideal projects
Fanciful schemes
Visionary projects
Changing weather
To be untrustworthy
To be inconsistent
To be rich and poor frequently
By the use of force
By the use of trickery
By cheating and deception
By practical experience which is rather rough
None of these
buy evil by mortgaging goodness
sell one's honesty for the sake of monetary benefits
suppress the voice of one's conscience and take to an immoral life
1/3
2/3
1/2
can not be determined
প্রশ্নঃ If a2 +b2 = 45 and ab= 18 , find 1/a +1/b.
বর্ণনাঃ
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