3211 . The number of flights leaving a certain airport doubles during every one-hour period between its 9 am opening and noon; afternoon, the number of flights leaving from the airport doubles during every two-hour period. If 4 flights left from the airport between 9 am and 10 am, how many flights left the airport between 2 pm and 4 pm?

A. 128
B. 32
C. 48
D. 64
E. None of these

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Answer: Option D

Explanation:

9 টা থেকে noon অর্থাৎ 12টা পর্যন্ত flight সংখ্যা double হয় প্রতি 1 ঘণ্টায় । 9 টা থেকে 10 টায় ছুটি flight হলে 10 - 11 টায় 2x, 11  -  12 টায় 4x / Noori - এর পর প্রতি দুই ঘণ্টায় হয় দ্বিগুণ। 12  - 2 টায় ৪r 2টা থেকে 4টায় হয় 16x, তাহলে x  =  4 দেওয়া আছে। সুতরাং ফ্লাইট সংখ্যা  =  16x  =  16   ×  4  =  64

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3212 . The number of girls in a class is 5 times the number of boys. Which of the following can not be the total number of children in the class?

A. 24
B. 30
C. 35
D. 126

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Answer: Option C

Explanation:

Hints: এটি Ans দেখে solve করতে হবে boy এর সংখ্যা b এবং girl এর সংখ্যা 5b এখন 5b + b = 6b

এখানে, 35 কে 6 দিয়ে নি:শেষে ভাগ করা যায় না। কাজেই সঠিক উত্তরঃ 35

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3213 . The number of marbles in Amin’s collection is 80% of the number in Rahim’s collection. If Rahim has 80 more marbles than Amin, how many marbles do they have altogether?

A. 720
B. 120
C. 135
D. 400

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Answer: Option A

Explanation:

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3214 . The number of mosquitoes, M(x) in millions of Dhaka city depends on rainy seasons' rainfall, x, in inches approximately as: M(x)=12x-x2. What would be the maximum of mosquitoes in Dhaka city?

A. 6
B. 36
C. 12-2x
D. 12

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Answer: Option B

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Uttara Bank PLC || Probationary Officer (09-11-2024) || 2024

A. 6
B. 9
C. 12
D. 18

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Answer: Option D

Explanation:

To find the number of parallelograms that can be formed from a set of four parallel lines intersecting another set of three parallel lines, you can use the following method:

Understand the pattern: Each parallelogram can be formed by selecting two vertical lines and two horizontal lines that intersect to create a closed shape.

Count the vertical lines: There are 4 vertical lines in the first set.

Count the horizontal lines: There are 3 horizontal lines in the second set.

Choose two vertical lines: You can choose 2 out of the 4 vertical lines in C(4, 2) ways, where C(n, k) represents the combination of n items taken k at a time.

Choose two horizontal lines: Similarly, you can choose 2 out of the 3 horizontal lines in C(3, 2) ways.

Calculate the total number of parallelograms: To find the total number of parallelograms, multiply the number of ways to choose vertical lines by the number of ways to choose horizontal lines:

Total parallelograms = C(4, 2) * C(3, 2)

Now, calculate:

C(4, 2) = 4! / (2!(4-2)!) = 6

C(3, 2) = 3! / (2!(3-2)!) = 3

Total parallelograms = 6 * 3 = 18

So, the number of parallelograms that can be formed is 18. The answer is indeed 18.

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Sonali Bank Ltd. Senior Officer Recruitment 01.06.2018

A. +3%
B. -3%
C. +17%
D. +20%

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Answer: Option C

Explanation:

ব্যাখাঃ Percentage change ( A + B + AB/100)

= { 30 + ( - 10) + 30× ( - 10)/100}%

= + 17%

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3217 . The number of passengers on Dhaka-Rangpur route increased by 35% when the fare was reduced by 15%. What will be the percentage increase in revenue?

A. 14.75
B. 19.25
C. 20.50
D. 25

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Answer: Option A

Explanation:

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3218 . The number of stamps in Ziko's collection is 75% of the number in Pallab's collection. If Pallab has 80 more stamps than Ziko, how many stamps do they have altogether?

A. 320
B. 240
C. 560
D. 620
E. None of these

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Answer: Option C

Explanation:

let, pallab has = X stamps

ziko has = 0.75X stamps

pallab has x - 0.75x = 0.25x more stamps than than ziko.

apq,

0.25x = 80

x = 320

pallab has = 320 stamps

ziko has = 320x.75 = 240

together they have = 320 + 240 = 560

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3219 . The number of student in 3 classes is in the ratio 2:3:4 if 12 students are increased in each class this ratio changes to 8:11:14. The total number of students in the three classes in the beginning in the three classes in the beginning was:

A. 162
B. 108
C. 96
D. 54

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Answer: Option A

Explanation:

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প্রবাসী কল্যাণ ব্যাংক-সিনিয়র অফিসার-09-10-2021

A. 24
B. 14
C. 48
D. 114
E. None of these

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Answer: Option A

Explanation:

4 student নিয়ে section = 16 - 3 = 13

13×24 = 312 students

after admitting new students

13 + = 16 section 21 student নিয়ে

16×21 = 336 students

নতুন student = 336 - 312 = 24

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দুর্নীতি দমন কমিশনের সহকারী পরিচালক-১২.০৪.২০১৩

A. 18
B. 24
C. 22
D. 25

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Answer: Option D

Explanation:

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সমন্বিত ৭ ব্যাংক || সিনিয়র অফিসার-05-11-2021 ||

A. 4
B. 5
C. 6
D. 7

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Answer: Option C

Explanation:

Here,

(2+3+5+x) / 4 = 4

=> 10+x = 16

=> x = 16-10 = 6.

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সমন্বিত ৫ ব্যাংক || অফিসার (ক্যাশ) (11-03-2022)

A. 6.5
B. 4
C. 3
D. 3.5

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Answer: Option C

Explanation:

the sum of the 5 quantities is 5 x 6 = 30. The average of three of these 5 quantities is 8. The sum of the remaining two quantities = 30 - 24 = 6. Average of these two quantities = 6/2 = 3.

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3224 . The one - third of the complementary angle to 60° is

A. 150°
B. 100°
C. 40°
D. 10°

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Answer: Option D

Explanation:

Complementary angle of 6০0 is (9০ - 6০)  = 3০0⸫ One third of 3০0 =  1/3×3০0 = 1০0

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Assistant Director (General) 06.07.18

A. 45%
B. 56%
C. 64%
D. 75%
E. none of them

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Answer: Option C

Explanation:

Let,

last year present = 100

this year projected present = (100 + 25) = 125

this year Actual present = (100 - 20) = 80

so, the percentage = {(80/125)×100}% = 64%

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3212 . The number of girls in a class is 5 times the number of boys. Which of the following can not be the total number of children in the class?

3213 . The number of marbles in Amin’s collection is 80% of the number in Rahim’s collection. If Rahim has 80 more marbles than Amin, how many marbles do they have altogether?

3214 . The number of mosquitoes, M(x) in millions of Dhaka city depends on rainy seasons' rainfall, x, in inches approximately as: M(x)=12x-x2. What would be the maximum of mosquitoes in Dhaka city?

3215 . the number of parallellograms that can be formed from a set of four parallei lines intersecting another set of three parallel lines is

3216 . The number of passengers on Dhaka-Rangpur route increased by 30% when the fare was reduced by 10%. What will be the percentage change in revenue?

3217 . The number of passengers on Dhaka-Rangpur route increased by 35% when the fare was reduced by 15%. What will be the percentage increase in revenue?

3218 . The number of stamps in Ziko's collection is 75% of the number in Pallab's collection. If Pallab has 80 more stamps than Ziko, how many stamps do they have altogether?

3219 . The number of student in 3 classes is in the ratio 2:3:4 if 12 students are increased in each class this ratio changes to 8:11:14. The total number of students in the three classes in the beginning in the three classes in the beginning was:

3220 . The number of students in each section of a school is 24, After admitting new students, three new sections were started. Now, the total number of sections is 16 and there are 21 students in each section. The number of new students admited is-

3221 . The numbers 11, 12, 14, x-2, x+4,x+ 9, 32, 38, 47 are arranged in ascending order and the median is 24: find x.

3222 . The numbers 2,3,5 and x have an average equal to 4 . What is x?

3223 . The of 5 quantities is 6. The average of 3 of them is 8. What is the average of the remaining two numbers?

3224 . The one - third of the complementary angle to 60° is

3225 . The organizers of a fair projected a 25 percent increase in attendance this year over that of last year, but attendance this year actually decreased by 20 percent. What percent of the projected attendance was the actual attendance?

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