1321 . A woman is 30 times older than her son. 18 years later she will be thrice as old as her son. What is the woman’s present age in years?

A. 30
B. 35
C. 36
D. 40

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Answer: Option D

Explanation:

Let, the present age of Mira is x

so her sons' present age is x/30

18 year later, the age of Mira will x + 18 and the age of her son will (x/30) + 18

Now, according to the question,

x + 18 = 3{(x/30) + 18}

or, x + 18 = (x/10) + 54

or, 10x + 180 = x + 540 [Multiplying both sides by 10]

or, 10x - x = 540 - 180

or, 9x = 360

or, x = 360/9

or, x = 40.

Ans: The present age of Mira is 40.

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1322 . A woman says, "If you reverse my own age , the figures represent my husband's age. He is senior to me and the difference between our ages is one-eleventh of their sum." What is her age now?

A. 23 years
B. 34 years
C. 45 years
D. 50 years
E. None of these

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Answer: Option C

Explanation:

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1323 . A woman says, "If you revise my own age, the figure represents my husband's age. He is, of course, senior to me and the difference between our ages is one eleventh of our sum. " What is the age of the woman?

A. 23
B. 34
C. 45
D. 54

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Answer: Option C

Explanation:

The correct option is C 45 years
Let x and y be the ten's and unit's digits respectively of the numeral denoting the woman's age.
Then, woman's age =(10x+y) years; husband's age =(10y+x) years.
Therefore (10y+x)−(10x+y)=(1/11)(10y+x+10x+y)
⇔(9y−9x)=(1/11)(11y+11x)=(x+y)⇔10x=8y⇔x=(4/5)y
Clearly, y should be a single-digit multiple of 5, which is 5.
So, x=4, y=5.
Hence, woman's age =10x+y=45 years.

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1324 . A woman was 30 years old when her daughter was born. Her age is now 6 years more than three times her daughter's age. How old will the daughter be in 5 years?

A. 17
B. 15
C. 19
D. 18

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Answer: Option A

Explanation:

Hints: ধরি,

কন্যার বর্তমান বয়স x বছর

মায়ের বর্তমান বয়স ( 30 + x) বছর

3x = (30 + x) - 6

3x = 30 + x - 6

x = 12

5 বছর পরে কন্যার বয়স হবে ( 12 + 5) = 17 বছর

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1325 . A worker earns Tk. 250 on the first day and spends tk. 200 on the second day, earns Tk. 250 on the third day and again spends Tk. 200 on the fourth day and so no. On which day would he have had Tk. 1000?

A. 20th day
B. 30th day
C. 40th day
D. 31th day

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Answer: Option D

Explanation:

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বাংলাদেশ ব্যাংক || অফিসার (ক্যাশ) (21-07-2023) || 2023

A. 21,500
B. 22,000
C. 22,500
D. 23,500

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Answer: Option C

Explanation:

ধরি, পূর্বে salary ছিল x টাকা
∴(x × 6%)+450=x × 8%
⇒6x/100+450=8x/100
⇒6x+45000/100=8x/100
⇒6x + 45000 = 8x
⇒2x = 45000
∴x = 22500

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বাখরাবাদ গ্যাস ফিল্ড লি. || সহকারী ব্যবস্থাপক (সাধারণ) (16-10-2021)

A. Tk.90
B. Tk.138
C. Tk 150
D. Tk. 160

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Answer: Option A

Explanation:

প্রশ্নঅনুসারে, একজন শ্রমিককে ৭ দিনের জন্য ভাড়া করা হয় তাকে পূর্ববর্তী দিনের চেয়ে পরবর্তী প্রতিদিন ১০ টাকা বেশি প্রদান করা হয়।

ধরি, starting payment ছিলো x টাকা

2nd day ( x + 10) , 3rd day ( x + 20) , 4th day ( x + 30) , 5th day ( x + 40) , 6th day ( x + 50) , 7th day ( x + 60) টাকা

প্রশ্নমতে, x + x + 10 + x + 20 + x + 30 = x + 40 + x + 50 + x + 60

4x + 60 = 3x + 150

x = 90.

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NRBC Bank PLC || Trainee Assistant Officer (TAO) (26-10-2024) || 2024

A. 4 days
B. 6 days
C. 8 days
D. 18 days

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Answer: Option A

Explanation:

B এর সময় লাগে = 12 দিন

A এর সময় লাগে = 12/2 = 6 দিন

কাজটি দুজনে একত্রে করলে মোট সময় লাগে

= 12 × 6 / 12 + 6 = 72 /18 = 4 দিন।

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

A. Tk. 275
B. Tk. 250
C. Tk. 212.5
D. Tk. 255
E. None of these

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Answer: Option B

Explanation:

Let cp is 100, sp is 110,

At 15% less cp is = 85, at 20% profit sp = 85*120% = 102,

Difference in sp = 110 - 102 = 8,

Now, 8 = 20,

So,100 = 20*100/8 = 250 tk

Ans. 250 tk

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1330 . A year ago the price of a toothbrush and the price of a comb were both Tk.50. The price of the toothbrush was increased by 20% while the price of the comb was decrrased by 10%. What is the difference in Taka between the current price of the toothbrush an

A. 5
B. 10
C. 15
D. 20

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Answer: Option C

Explanation:

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গ্যাস ট্রান্সমিশন কোম্পানি লিমিটেড | সহকারী ব্যবস্থাপক | ২০.০৪.২০১৮

A. 40
B. 50
C. 60
D. 30
E. None of these

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Answer: Option B

Explanation:

Let the number of horse is x

then pigeons are (80 - x)

A/Q,

4x + 2(80 - x) = 260

4x + 160 - 2x = 260

2x = 260 - 160

2x = 100

x = 50

The number of horses is 50.

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Bangladesh Bank - Assistant Director - 2009

A. 40
B. 30
C. 50
D. 60

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Answer: Option C

Explanation:

Let the number of horse is x

then pigeons are (80 - x)

A/Q,

4x + 2(80 - x) = 260

4x + 160 - 2x = 260

2x = 260 - 160

2x = 100

x = 50

The number of horses is 50

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1333 . A. B and C are partners in a business. Their shares are in the proposition of $\frac{1}{3} : \frac{1}{4} : \frac{1}{5}$ A withdraws half of his capital after 15 months and after another 15 months, a profit of Tk. 4340 is divided. The share of C is-

A. Tk. 1240
B. Tk. 1250
C. Tk. 1300
D. Tk. 1400

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Answer: Option A

Explanation:

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Janata Bank PLC || Officer (Rural Credit) (27-10-2023) || 2023

A. 160
B. 150
C. 130
D. 110

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Answer: Option C

Explanation:

The variable cost at 40 units production is 4000 and at 46 units is around 4800 – the graph is almost a straight line between these two points. Thus the marginal cost of increasing production from 40 units =

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Bangladesh Bank - Officer - 2015

A. 24
B. 9
C. 18
D. 15

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Answer: Option D

Explanation:

Area of the square = 3^2=9

Area of the rechangle = 4×6=24

∴Area of region outside of ABCD & inside of EFGH=24 - 9 = 15

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1321 . A woman is 30 times older than her son. 18 years later she will be thrice as old as her son. What is the woman’s present age in years?

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1322 . A woman says, "If you reverse my own age , the figures represent my husband's age. He is senior to me and the difference between our ages is one-eleventh of their sum." What is her age now?

1323 . A woman says, "If you revise my own age, the figure represents my husband's age. He is, of course, senior to me and the difference between our ages is one eleventh of our sum. " What is the age of the woman?

1324 . A woman was 30 years old when her daughter was born. Her age is now 6 years more than three times her daughter's age. How old will the daughter be in 5 years?

1325 . A worker earns Tk. 250 on the first day and spends tk. 200 on the second day, earns Tk. 250 on the third day and again spends Tk. 200 on the fourth day and so no. On which day would he have had Tk. 1000?

1326 . A worker union contract specifies a 6% salary increase plus a Tk. 450 bonus for each worker. For a worker, this is equivalent to 8% salary increase. What was this woker's salary before the new contact?

1327 . A worker was hired for 7 days. Each day, he was paid Tk. 10 more than what he was paid for the previous day of work. The total amount he was paid in the first 4 days of work equaled the total amount he was paid in the last 3 days. What was his starting pay?

1328 . A works twice as fast as B. If B can complete a work in 12 days independently, the number of days in which A and B can together finish the work is:

1329 . A wristwatch was sold at 10% profit. If the cost was 15% less and the selling price was Tk. 20 less, then the trader would have made a profit of 20%. What was the cost of the wristwatch?

1330 . A year ago the price of a toothbrush and the price of a comb were both Tk.50. The price of the toothbrush was increased by 20% while the price of the comb was decrrased by 10%. What is the difference in Taka between the current price of the toothbrush an

1331 . A Zoo keeper counted the heads of the animals in a zoo and found it to be 80. When he counted the legs of the animals he found it to be 260. If the zoo had either pigeons or horses, how many horses were there in the zoo ?

1332 . A zookeeper counted the heads of the animals in a zoo and found it to be 80. When he counted the legs of the animals he found it to be260. If the zoo had either pigeons or horses, how many horses were there in the zoo?

1334 . ABC Ltd. is considering increasing the production level . What is the approximate marginal cost of increasing production form its July level of 40 units to 41 units?

1335 . ABCD is a square, EFGH is arectangle, AB = 3, EF = 4, FG = 6. Determine the area of the region outside of ABCD and inside of EFGH.

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