Bangladesh Bank AD Math Question Solution 2001

Explanation:
Promoted probationary officers = 60 × (2/5) = 24
Terminated probationary officers = 12
Remain probationary officers = 60 - (24 + 12) = 24
Percentage = 24 × 100/60 = 24 × (5/3) = 40%

Explanation:

s.p. - c.p = profit

or, 250 - c.p = c.p. × 25/100

or, c.p. + c.p. × 1/4 = 250

or, c.p. = (250 × 4)/5

Explanation:

Let, The sum of money = 11x + 9x + 7x + 4x = 31x

ATQ, 4x = 1200

Or, x = 300

So, the sum of money = 31x300 = 9,300 Taka

Explanation: 1 meter = 100 centimeter

Explanation:

Length = 600/100 cm = 6 meters

Width = 300 cm = 300/100 = 3 meters

So, perimeter = 2(Length + Width) = 2(3 + 6) m = 18 m

So,18 meters will be needed to enclose a rectangular field.

Explanation:
Let's consider the salary of the officer =100
So, if the salary is increased by 25% then the new salary =125
To make his salary original 25 must be subtracted from 125, then his salary will be 100 or his original salary
So,
% decrease = (25/125) × 100
=20
Hence 20% of his new salary must be deducted so that his salary becomes his original salary.

Remaining people = 15 - 4 = 11

15 people need to work for 44 hours.

So, 11 people need to work for (44x15)/11 = 60 hours

Explanation:

The percentage = 180/300 × 100 = 60

Explanation:

Let,

The price of rice in the year 1994 = Tk. 100

So, the price of rice in the year 1995 = 100 + 10 = Tk. 110

The price of rice in the year 1996 = 110 - (110 × 5)/100 = 104.5

The increase in price = 104.5 - 100 = 4.5%

Explanation:

The percentage of male employees = (4/5) x 100 = 80

Explanation:

Time, n = 9 months = 3/4 of year = 0.75 year;

Rate of Interest, r = 6% = 6/100 = 3/50 = 0.06

Interest, I = Pnr = 10000 × 0.75 × 0.06

Explanation: For the first 1000, the profit is 5% i.e., TK. 50

For the next 6000 - 1000 = 5000, the profit is 4% i.e., TK. 200

Total profit = 50 + 200 = 250

Explanation:

10% of 3000 - 5% of 3000

= (10 × 3000)/100 - (5× 3000)/100

= 300 - 150

= 150

Explanation: 0.03 × 0.05 = 0.0015 = 0.15%

Explanation:

Let, Cost price (CP) = 100

so, Sell Price (SP) = 100 - 25 = 75

SP TK. 75 = CP TK.100

SP TK. 250 = CP TK. (100*250)/ 75 = TK. 333.333

Explanation:
When you multiply a whole number times itself, the resulting product is called a square number, a perfect square, or simply "a square." So 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, and so on, are all square numbers.

Explanation:
Assume, the pen has x
and the pencil has y
According to the question,
7x + 3y = 81
Now, a possible solution:
x = 3, y = 20
x = 6, y = 13
x = 9, y = 6
Now, test option: 9:6 = 3:2

Explanation:

Let, Faster workers complete the job in x days

Slower workers complete the job in 2x days

In 1 day,

The faster worker completes 1/x parts

Slower workers complete 1/2x parts

we have, 1/x + 1/x + 1/2x = 1/12

or, x = 30

Therefore, 1 Faster worker can do the work = 30 days

Explanation:
Roman numeral: The common basic symbols are I ( = 1), V ( = 5), X ( = 10), L ( = 50), C ( = 100), D ( = 500), and M ( = 1000). The Roman numerals for one to nine are I, II, III, IV, V, VI, VII, VIII, IX.

Explanation:
The rate of discount = (21,000x 100)/3,00,000 = 7%

Explanation:

X = 1.25 × Y = (5/4) × Y

Or, Y = 4X/5

Again, X = 0.80 × Z = 4Z/5

Or, Z = 5X/4

We have, X + Y + Z = 610

or, X + 4X/5 + 5X/4 = 610

or, 20X + 16X + 25X = 61020

or, X = 200

Total profit = 50 + 200 = 250

Explanation:

P = I/rn = 200/(4 × 0.1) = 500 Taka

Explanation:

Suppose, the salary in 1997 was Tk. 100

Each year, he received 10% more than the previous year

In 1997, salary = 100

In 1998, salary = 100 + 10 = Tk. 110

In 1999, salary = 110 + 110x (10/100) = 110 + 11 = 121

Changes = 121 – 100 = 21

Explanation:

2nd Test's Marks = 2 × 82 - 80 = 84

3rd Test's Marks = 3 × 78 - (80 + 84) = 234 - 164 = 70

The average of his 2nd and 3rd tests' marks = (84 + 70)/2 = 154/2 = 77

Explanation:
Explanation:
১ কোটি হলো ১০০ লাখ এর সমান।
১০ মিলিয়নে ১ কোটি।
১০০ কোটিতে ১ বিলিয়ন।

Explanation:

Let,

The breadth of a rectangle is x meter

The length of a rectangle is 2x meter

According to the question,

2x² = 200

or, x² = 100

or, x = 10

Therefore, the perimeter of rectangle is = 2(x + 2x) meter = 6x meter = 6 ×10 meter = 60 meters

Explanation:

4 workers can do a job in 48 days

1 worker can do the job in (48 × 4) days

3 workers can do the job in (48 × 4)/3 days = 64 days

Explanation: 6-month interest rate = 10/2 % = 1/20. Interest = C - P = P(1 + r)ⁿ - P = 2000(1 + 1/20)² - 2000 = 2000 × 21/20 × 21/20 - 2000 = 2205 - 2000 = 205

Explanation:

The rate of profit margin ( in %) = (2000x100)/50000 = 4%

Explanation:
% চিহ্নটি শতাংশ চিহ্ন যা শতকরা ভাগ, সংখ্যা বা অনুপাতকে ১০০ এর ভগ্নাংশ হিসেবে চিহ্নিত করতে ব্যবহৃত হয়।

Explanation:

Rate of interest r = (I × 100) /(P × n) = (3000 × 100)/(50,000 × 2) = 3 %

Explanation:

Field's Length = 360 cm = 3.6 m

& Width = 160 cm = 1.6 m

Field's Perimeter = 2 (3.6 + 1.6) m = 2 × 5.2 = 10.4 m

The total cost of fencing = 10.4 × 100 = Tk. 1040

Explanation:

Let the cost price of a shirt be x

Therefore, the cost of 10 shirts will be = 10x

The Selling price (SP) of eight shirts = 10x

Since the cost price of each shirt is x the cost price (CP) of eight shirts will be 8x

Profit made selling 8 shirts = Selling Price of 8 shirts - Cost price of 8 shirts = 10x - 8x = 2x

Profit % made by selling 8 shirts will be = [ (SP - CP)/CP] × 100

= [(10x - 8x)/8x] × 100

= [2x/8x] × 100

= [1/4] × 100

= 25% profit

Explanation:

1% of 0.025 = (1 × 0.025)/100 = 0.00025

Explanation:

হর 4 এবং 5 এর ল.সা.গু = 20

(1/4 × 20) : (3/5 × 20)

= 5 : 12