6601 . A student's marks were wrongly entered as 83 instead of 63. Due to the error the average marks for the class got increased by 0.5. Find the number of students in the class.

A. 10
B. 20
C. 40
D. 73

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Answer: Option C

Explanation:

নম্বর বেশি=83-63=20 প্রশ্নমতে, 0.5 অংশ বৃদ্ধি =20 1 অংশ বৃদ্ধি = \frac{20}{0.5} =40 ছাত্র= ছাত্রীর সংখ্যা=40

তিতাস গ্যাস ট্রান্সমিশন অ্যান্ড ডিস্ট্রিবিউসন কো. লি.-সহকারী ব্যবস্থাপক-08-10-2021

প্রিমিয়াম প্ল্যান: ১ মাস

99 ৳

৩০ দিনের জন্য সকল লাইভ এবং আর্কাইভ মডেল টেস্ট, প্রশ্ন ব্যাংক ও লেকচার শিট সহ অ্যাপ এর প্রিমিয়াম সব এক্সেস পাবেন।

সাবস্ক্রিপশন লিংক

6602 . A started a business with tk 21000 and is joined afterwards by B with tk 36000. After how many months did B join if the profits at the end of the year are divided equally?

A. 3
B. 4
C. 5
D. 6

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Answer: Option C

Explanation:

Hints: As their profit is equal at the end of the year, their ratio is equal to their capital ratio oppositly

Their capital ratio is = 21000 : 36000 = 21 : 36 = 7 : 12

So, their time ratio is equal to 12 : 7

A has contributed for 12 months

and B contributed for 7 months

So, B has joined after 12 - 7 = 5 months.

পল্লী কর্ম সহায়ক ফাউন্ডেশনের অ্যাসিসট্যান্ট ম্যানেজার-০৭.০৩.২০১৪

A. 5000
B. 5750
C. 6000
D. 6250
E. None

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Answer: Option D

Explanation:

সাধারণ বীমা কর্পোরেশন || সহকারী ব্যবস্থাপক (08-11-2024) || 2024

A. 0.56
B. 0.76
C. 0.34
D. 0.66

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Answer: Option D

Explanation:

4 টি ক্লাসে মোট ছাত্র আছে=10+20+30+40=100জন ১ম ক্লাসে পাশ করে 10 এর 20%= 2 জন ২য় ক্লাসে পাশ করে 20 এর 30%=6 জন ৩য় ক্লাসে পাশ করে 30 এর 60%=18 জন ৪র্থ ক্লাসে পাশ করে 40 এর 100%=40 জন মোট পাশ করে =2+6+18+40=66 জন শতকরা পাশ করে= (\frac{66}{100} ×100%) =66%

বাংলাদেশ রপ্তানি প্রক্রিয়াকরণ কর্তৃপক্ষ (সহকারী ম্যানেজার) 02-04-2021

A. 13.34
B. 22.62
C. 34.14
D. 42.71

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Answer: Option B

Explanation:

বাংলাদেশ অর্থনৈতিক অঞ্চল কর্তৃপক্ষ (সহকারী ব্যবস্থাপক) 25-09-2020

A. 5
B. 6
C. 3
D. 7

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Answer: Option C

Explanation:

তিতাস গ্যাস ট্রান্সমিসন এন্ড ডিস্ট্রিবিউশন কোম্পানী লিমিটেড (TGTDCL) || সহকারী প্রকৌশলী (EEE) (24-05-2024) || 2024

A. 30%
B. 20%
C. 40%
D. 50%

View Answer	Favorite Question

Answer: Option D

Explanation:

ম ন ে ক র ি, প ্ র ক ৃ ত ম ূ ল ্ য = 100 ট া ক া এ খ ন, ব া জ া র ম ূ ল ্ য 80 % ক ্ র য ় ম ূ ল ্ য 120 % \Rightarrow \frac{ব া জ া র ম ূ ল ্ য}{ক ্ র য় ম ূ ল ্ য} = \frac{120 %}{80 %} \Rightarrow ব া জ া র ম ূ ল ্ য = \frac{120}{80} \times ক ্ র য় ম ূ ল ্ য \Rightarrow \frac{120 \times 100}{80} \Rightarrow 150 ট া ক া ∴ ম ূ ল ্ য ব ৃ দ ্ ধ ি = 150 - 100 = 50 ট া ক া

জাতীয় নিরাপত্তা গোয়েন্দা সংস্থা-(NSI) Assistant Director- Research officer &amp- Assistant Programmer-০৮/১০/২০২১

A. 55
B. 56
C. 57
D. 58

View Answer	Favorite Question

Answer: Option B

Explanation:

পল্লী কর্ম সহায়ক ফাউন্ডেশনের অ্যাসিসট্যান্ট ম্যানেজার-০৭.০৩.২০১৪

A. 1/4
B. 2/3
C. 1/2
D. 3/4

View Answer	Favorite Question

Answer: Option D

Explanation:

ঢাকা ইলেকট্রিক সাপ্লাই কোম্পানি ।। Assistant Engineer (20-05-2023)

A. 150
B. 148
C. 151
D. 174

View Answer	Favorite Question

Answer: Option D

Explanation:

সিকিউরিটি প্রিন্টিং কর্পোরেশন বাংলাদেশ | সহকারী ব্যবস্থাপক- 26-11-2021

A. 253
B. 252
C. 145
D. 370

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Answer: Option A

Explanation:

253 + 99 = 352, The number of are reversed.

সিকিউরিটি প্রিন্টিং কর্পোরেশন বাংলাদেশ | সহকারী ব্যবস্থাপক- 26-11-2021

A. 600
B. 750
C. 1000
D. 1250

View Answer	Favorite Question

Answer: Option D

Explanation:

Rate for walking per minute = (5×1000)/60 meter = 250/3 meter

In 1 minute he crosses 250/3 meter

In 15 minute he crosses 250/3 meter

15 minute he crosses = (250×15)/3 = 1250 meter

So, the length of the bridge is 1250 meter.

পল্লী কর্ম সহায়ক ফাউন্ডেশনের অ্যাসিসট্যান্ট ম্যানেজার-০৭.০৩.২০১৪

A. 18
B. 24
C. 36
D. 45

View Answer	Favorite Question

Answer: Option B

Explanation:

লোকটি প্রথম 2 ঘণ্টা অতিক্রম করে = 30 × 2 = 60 মাইল ∴ Average speed = মোট দূরত্ব / মোট সময় = ( 60 + 60)/(2 + 3) = 120/5 = 24 mph

C ইউনিট ব্যবসা শিক্ষা (২০২৩-২০২৪) || (09-03-2024) || চট্টগ্রাম বিশ্ববিদ্যালয়

A. 10
B. 12
C. 14
D. 16

View Answer	Favorite Question

Answer: Option D

Explanation:

A. 60 kmph
B. 55 kmph
C. 63 kmph
D. 57 kmph

View Answer	Favorite Question

Answer: Option C

Explanation:

To calculate the speed of the train, we can use the information that the man can count 21 telephone posts in one minute and that the posts are known to be 50 meters apart. This means that in one minute, the train travels a distance equal to the spacing between 21 telephone posts.

Distance traveled in one minute = 21 posts * 50 meters/post = 1050 meters

Since there are 60 seconds in a minute, we need to convert the distance to meters per second:

Speed (in meters per second) = Distance (in meters) / Time (in seconds) Speed = 1050 meters / 60 seconds = 17.5 meters/second

To express the speed in kilometers per hour (km/h), we can multiply by 3.6 (since 1 meter per second is equal to 3.6 kilometers per hour):

Speed = 17.5 meters/second * 3.6 km/h = 63 km/h

So, the speed of the train is 63 kilometers per hour.

সিকিউরিটি প্রিন্টিং কর্পোরেশন বাংলাদেশ | সহকারী ব্যবস্থাপক- 26-11-2021

6601 . A student's marks were wrongly entered as 83 instead of 63. Due to the error the average marks for the class got increased by 0.5. Find the number of students in the class.

6602 . A started a business with tk 21000 and is joined afterwards by B with tk 36000. After how many months did B join if the profits at the end of the year are divided equally?

6603 . A shopkeeper suffers a loss of 20% upon selling a shirt for Tk 4000. If he wants to make 15% profit after giving an 8% discount on the marked price, what is the marked price of the shirt, in Tk.?

6604 . A school has only four classes having 10, 20, 30 and 40 students respectively with pass percentage of 20%, 30%, 60% and 100% respectively. Find the pass-percentage of the entire school.

6605 . A right triangle has sides in the ratio of 5 : 12 : 13. What is the measure of the smallest angle in the triangle, in degrees?

6606 . A right angled triangle, whose perpendicular sides measure 1.8 cm and 2.4 cm, is inscribed in a circle. What is the circumference of the circle (in cm)?

6607 . A restaurant makes 20% profit after selling a set menu at a discount of 20% . What is the percentage increase of marked price?

6608 . A rectangular plot measuring 90 meters by 50 meters is to be enclosed by wire fencing.If the poles of the fence are kept 5meteres apart,how many poles will be needed?

6609 . A problem is given to three students whose chances of solving it are 1/2, 1/3 and 1/4 respectively. What is the probability that the problem will be solved?

6610 . A number x is divided by 7. When this number is divided by 8, 12 and 16 . It leaves a remainder 3 in each case . The least value of x is?

6611 . A number consists of 3 digits hose sum is 10 . The middle digit is e3qual to the3 sum of the other two and the number will be increased by 99 if its digits are recersed. The number is-

6612 . A man walking at the rate of 5 km/hr crosses a bridge in 15 minutes. The length of the bridge (in meters) is-

6613 . A man travels for 2 hours at 30 miles an hour and then covers 60 miles in the next 3 hours. What is the average rate for the entire journey?

6614 . A man travelled a distance of 61 kn in 9 jours. He travelled party on food at 4 kn/hr and party on bicycle at 9 km/hr. What is the distance (in km) travelled on foot?

6615 . A man in a train notice that he can count 21 telephone posts in one minute.. If they are known to be 50 meters apart, then at what speed is the train travelling?

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