2911 . The difference between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two-digits of that number?

A. 3
B. 4
C. 6
D. 9
E. None of these

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Answer: Option B

Explanation:

Let the two-digit number be 10x+y, where x is the digit in the tens place and y is the digit in the units place.

When the digits are interchanged, the number becomes 10y+x.

According to the given information, the difference between the two-digit number and the number obtained by interchanging the positions of its digits is 36. Mathematically, this can be represented as:

(10x+y)−(10y+x)=36

Simplifying the equation:

10x+y−10y−x=36 9x−9y=36 x−y=4

So, the difference between the two digits of the number is 4.

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

2912 . The difference between the compound interest and simple interest on a certain amount of money at 5% per annum for 2 years is Tk. 15. Find the principal amount.

A. Tk. 4,500
B. Tk. 7,500
C. Tk. 5,000
D. Tk. 6,000

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Answer: Option D

Explanation:

2913 . The difference between the cost price and sale price of an article is Tk. 240. If the profit is 20%, the selling price is:

A. Tk. 1240
B. Tk. 1400
C. Tk. 1600
D. None of these

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Answer: Option A

Explanation:

Hints: ধরি cost price x তাহলে 20% profit এ sell price হবে

x + x এর 20%

= x + 0.2x

= 1.2x

1.2x - 1x = 240

.2x = 240

x = 1200

Selling price = 1200 + 240 = 1440

2914 . The difference between the length and the breadth of a blackboard is 8 cm. If the breadth is decreased by 4 cm and the length is increased by 7 cm the areas remains the same. Find the dimensions of the blackboard?

A. 30,22
B. 28,20
C. 34,26
D. 56,48

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Answer: Option B

Explanation:

2915 . The difference between the local value and the face value of 7 in the numberal 32675149 is-

A. 75142
B. 64851
C. 5149
D. 69993

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Answer: Option D

Explanation:

The local value of 7 in the numeral 32675149 is 70000 because 7 is in the ten thousandths place.

The face value of 7 is 7 itself.

The difference between the local value and the face value of 7 is 70000 - 7 = 69993.

Therefore, the answer is 69993

পূবালী ব্যাংক লিমিটেড || সিনিয়র অফিসার (30-09-2023) || 2023

A. 1
C. 3
D. 2

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Answer: Option A

Explanation:

Hints:

32 বা (2)5 এর উৎপাদক সংখ্যা = ( 5 + 1) = 6

64 বা ( 2)6 এর উৎপাদক সংখ্যা = ( 6 + 1) = 7

উৎপাদক সংখ্যর পার্থক্য = ( 7 - 6 ) = 1

2917 . The difference between the place value and the face value of 6 in the numeral 856973 is --

A. 973
B. 6973
C. 5994
D. None of these

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Answer: Option C

Explanation:

ব্যাখাঃ (Place value of 6) - ( face value of 6) = (6000 - 6) = 5994

2918 . The difference between the present ages of A and D is 14 years. Seven years ago, the ratio of their ages was 5 : 7 respectively. What is D's present age?

A. 56 years
B. 49 years
C. 58 years
D. 45 years

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Answer: Option A

Explanation:

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

A. 7 cm
B. 5 cm
C. 9 cm
D. 3 cm

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Answer: Option B

Explanation:

Let the radius of the smaller circle be r cm
Then, radius of bigger circle = (r + 14)cm
Given, π(r + 14) 2−π(r) 2 = 1056
⇒ π(r 2 + 28r + 196)−πr 2 = 1056
⇒πr 2 + 28πr + 196π−πr 2 = 1056
⇒28 × 22/ 7 + 196x22/ 7 = 1056
= >88r + 616 = 1056
⇒r = 5 cm.

Officer (Cash) -Sonali Bank | BD Development | BD Krishi Bank - 12.10.2018

A. 7 cm
B. 5 cm
C. 9 cm
D. 3 cm

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Answer: Option B

Explanation:

2921 . The difference between two numbers is 5 and the difference between their square is 65. What is the smaller number?

A. 9
B. 5
C. 11
D. 13

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Answer: Option A

Explanation:

ধরি, সংখ্যা দুটি x ও y যেখানে x > y

x - y = 5

x2 - y2 = 65

( x + y) ( x - y) = 65

( x + y) 5 = 65

x + y = 65/5

x + y = 13

বড় সংখ্যাটি = ( x + y) + ( x - y) / 2 = 13 + 5/2 = 9.

সমন্বিত ৭ ব্যাংক || অফিসার (ক্যাশ) (24-05-2024)

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

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Answer: Option B

Explanation:

ধরি, বড় সংখ্যা= x, ছোট সংখ্যা=y

প্রশ্নমতে, x - y =7……….(1)

xy =60 => x => 60/y

(1) নং এ x এর মান বসিয়ে পাই,

60/y - y =7

=> 60 - y2 - 7y =0

=> y2 +7y - 60= 0

=> y2 +12y -5y -60=0

=> y(y+12)-5(y+12)=0

=> (y+12)(y-5)=0

So, y = 5 but y≠-12

NRBC BANK PO/TAO (16-06-2023) || 2023

A. 27
B. 33
C. 20
D. 81

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Answer: Option A

Explanation:

2924 . The difference between two positive numbers is 16. If the smaller of the two is 3/5th of the large, what is the value of the smaller number?

A. 18
B. 24
C. 30
D. 40

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Answer: Option B

Explanation:

Let the larger and smaller numbers be X and 3X/5 respectively.

Then, X - 3X/5 = 16

or, (5X - 3X)/5 = 16

or, 2X = 80

or, X = 40

So, the smaller number, 3X/5 = 3×40/5 = 24

তিতাস গ্যাস ট্রান্সমিশন এন্ড ডিষ্ট্রিবিউশন কোম্পানী লি. | সহকারী ব্যবস্থাপক (অ্যাকাউন্টস) | ২৭.০৪.২০১৮

A. 2√6
B. 16√16
C. 9√6
D. None of these

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Answer: Option A

Explanation:

2911 . The difference between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two-digits of that number?

2912 . The difference between the compound interest and simple interest on a certain amount of money at 5% per annum for 2 years is Tk. 15. Find the principal amount.

2913 . The difference between the cost price and sale price of an article is Tk. 240. If the profit is 20%, the selling price is:

2914 . The difference between the length and the breadth of a blackboard is 8 cm. If the breadth is decreased by 4 cm and the length is increased by 7 cm the areas remains the same. Find the dimensions of the blackboard?

2915 . The difference between the local value and the face value of 7 in the numberal 32675149 is-

2916 . The difference between the number factors of 32 & 64 is:

2917 . The difference between the place value and the face value of 6 in the numeral 856973 is --

2918 . The difference between the present ages of A and D is 14 years. Seven years ago, the ratio of their ages was 5 : 7 respectively. What is D's present age?

2919 . The difference between the radii of bigger circle and smaller circle is 14 cm and the difference between their areas is 1056 cm2 . Radius of the smaller circle is _

2920 . The difference between the radio of bigger difference between circle and smaller circle is 14 and the difference between their sareas is 1056 cm2 . Radius of the smaller circle is .

2921 . The difference between two numbers is 5 and the difference between their square is 65. What is the smaller number?

2922 . The difference between two numbers is 7 and their product is 60, then one of the two numbers must be

2923 . The difference between two positive number is 3 and the sum of their squares is 369. Then the sum of the numbers is -

2924 . The difference between two positive numbers is 16. If the smaller of the two is 3/5th of the large, what is the value of the smaller number?

2925 . The difference between √150 and √54 is _____

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