1651 . From 1:09 pm to 1:13 pm Arif read pages 109 to 113 of a nobel. What is his rate of reading in pages per munite?

A. 5/4
B. 4/5
C. 1
D. 3/5

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Answer: Option A

Explanation:

Hints: এখানে ১০৯ থেকে ১১৩ মোট ৫ পেজ পড়তে আরিফের সময় লাগে ১ঃ০৯ PM to 1:13 pm অর্থাৎ 4 minute.

4 মিনিটে পড়ে 5 পৃষ্ঠা

1 মিনিটে পড়ে 5/4 পৃষ্ঠা = 5/4

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1652 . From 2004 to 2005. the sales of a book decreased by 80%. If the sales in 2006 were the same as in 2004, by what percent did they increase from 2005 to 2006 ?

A. 80%
B. 100%
C. 120%
D. 400%

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Answer: Option D

Explanation:

let, 100 copies were sold in 2004

∴copies sold in 2005 = 100 - 80 = 20

copies sold in 2006 = 100

so, required increase = (100 - 20)/20 × 100 = 400% (ans)

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1653 . From 2004 to 2005 the sales of a book decreased by 80%. If the sales in 2006 were the same as in 2004, by what percent did they increase from 2005 to 2006?

A. 80%
B. 100%
C. 120%
D. 400%

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Answer: Option D

Explanation:

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1654 . From 6 boys and 4 girls, 5 are to be selected for admission for a particular course. In how many ways can this be done if there must be exactly 2 girls?

A. 60
B. 30
C. 90
D. 120

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Answer: Option D

Explanation:

nCr = combination of n things taken r at a time = n!/((n - r)!*r!)

Number of ways to select 2 girls (exactly) from 4 - 4C2

6C3 - Number of ways to select remaining 3 boys from 6 to make total 3 + 2 = 5 for admission.

6C3 = 6!/(3!*3!) = 720/(6*6) = 20

4C2 = 4!/(2!*2!) = 24/4 = 6.

So, 6C3*4C2 = 20*6 = 120 ways.

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Sonali-Janata-Agrani &amp-Rupali Bank Ltd. &amp-RAKUB Officer Recruitment 28.03.2008

A. 350
B. 65
C. 1050
D. 120

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Answer: Option A

Explanation:

Ways of 3 girls to be selected from 5 girls = ⁵C3

Ways of (6 - 3 = 3) boys to be selected from 7 boys = ⁷C3

Total ways of selection = ⁵C3×⁷C3 = {(5×4×3)/(1×2×3})×{(7×6×5)/(1×2×3)} = 10×35 = 350

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1656 . From a container having pure milk 20% replaced by water and the pricess is repeated thrice. At the end of the third operation the milk is--

A. 51.2
B. 58.8
C. 40
D. 50

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Answer: Option A

Explanation:

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1657 . From a group of 7 men and 6 women, five persons are to be selected to form a committee so that at least 3 men are in the committee. In how many ways can it be done?

A. 564
B. 645
C. 735
D. 756

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Answer: Option D

Explanation:

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আশুগঞ্জ পাওয়ার স্টেশন কোম্পানী লিঃ (APSCL) || সহকারী প্রকৌশলী (মেকানিক্যাল ও ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক্স) (27-09-2024) || 2024

A. MC is an increasing function of production quantity .
B. MC is a decreasing function of production quantity
C. Initially MC is a decreasing function of production quantity, attains a minimum and then it is an increasing function of production quantity.
D. None of them

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Answer: Option A

Explanation:

It can be seen that the marginal cost is increasing as production quantify is increasing. So, option (a) is the correct ans.

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Bangladesh Bank - Officer - 2015

A. 30
B. 540
C. 180
D. 910

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Answer: Option B

Explanation:

The minute hand of a standard clock rotates 360° per hour. Now, 6:15 pm to 7:45 pm = 1.5 hour. So, the minute hand will rotate = 1.5×360° = 540°

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1660 . Given $16^{x} = 4^{4}$ what is x?

A. $- 2$
B. $- \frac{1}{2}$
C. $\frac{1}{2}$
D. $2$

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Answer: Option D

Explanation:

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সমন্বিত ৮টি ব্যাংক ও ১টি আর্থিক প্রতিষ্ঠান - সিনিয়র অফিসার (16-05-2025)

A. 18
B. 40
C. 14
D. 22

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Answer: Option C

Explanation:

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1662 . Given that, 24 carat gold is pure gold, 18 carat gold is 3/4th of pure gold and 20 carat gold is 5/6th of pure gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is -

A. 5 : 8
B. 10 : 9
C. 8 : 5
D. 9 : 10

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Answer: Option D

Explanation:

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1663 . Given that $1^{2} + 2^{2} + 3^{2} . . . . . . + 10^{2} = 385,$ what is the value of $3^{2} + 6^{2} + 9^{2} + . . . . . 30^{2} ?$

A. $1, 155$
B. $1, 540$
C. $1, 925$
D. $3, 465$

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Answer: Option D

Explanation:

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

A. 36
B. 18
C. 9
D. 6

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Answer: Option D

Explanation:

w + x = - 4....(a)

x + y = 25....(b)

y + w = 15....(c)

(a) + (b) + (c)

2(x + y + z) = 36

= )x + y + z = 18

= )x + y + z/3 = 18/3

So x + y + z/3 = 6

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

A. 5
B. -3
C. 12
D. -15

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Answer: Option D

Explanation:

To find the value of mn, we can use the given equations:

2(m + n) + m - 9 = 0
3m - 3n = 24

First, we can simplify equation (2) by dividing both sides by 3:

3m - 3n = 24

Dividing both sides by 3 gives:

m - n = 8

Now, we can solve equation (1) for m in terms of n:

2(m + n) + m - 9 = 0

Distribute the 2 on the left side:

2m + 2n + m - 9 = 0

Combine like terms:

3m + 2n - 9 = 0

Add 9 to both sides:

3m + 2n = 9

Now, we can use the equation m - n = 8 to express m in terms of n:

m = n + 8

Substitute this expression for m into the equation 3m + 2n = 9:

3(n + 8) + 2n = 9

Distribute the 3 on the left side:

3n + 24 + 2n = 9

Combine like terms:

5n + 24 = 9

Subtract 24 from both sides:

5n = 9 - 24 5n = -15

Now, divide both sides by 5 to find n:

n = -15 / 5 n = -3

Now that we have found n, we can find m using m = n + 8:

m = -3 + 8 m = 5

So, the values of m and n are:

m = 5 n = -3

Now, we can find the value of mn:

mn = 5 * (-3) = -15

Therefore, mn = -15.

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

1651 . From 1:09 pm to 1:13 pm Arif read pages 109 to 113 of a nobel. What is his rate of reading in pages per munite?

BdMerit-এর ১ বছরের প্রিমিয়াম প্যাকেজ কিনে ১০ মাস নিয়মিত প্রস্তুতি নিন—

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1652 . From 2004 to 2005. the sales of a book decreased by 80%. If the sales in 2006 were the same as in 2004, by what percent did they increase from 2005 to 2006 ?

1653 . From 2004 to 2005 the sales of a book decreased by 80%. If the sales in 2006 were the same as in 2004, by what percent did they increase from 2005 to 2006?

1654 . From 6 boys and 4 girls, 5 are to be selected for admission for a particular course. In how many ways can this be done if there must be exactly 2 girls?

1655 . From 7 boys and 5 girls, 6 are to be selected for admission for a particular course. In how many ways can this be done if there must be exactly 3 girls?

1656 . From a container having pure milk 20% replaced by water and the pricess is repeated thrice. At the end of the third operation the milk is--

1657 . From a group of 7 men and 6 women, five persons are to be selected to form a committee so that at least 3 men are in the committee. In how many ways can it be done?

1658 . From the data provided it can be inferred that , for production levels in the range of 0 to 60 units:

1659 . From the time 6:15 pm to the time 7:45 pm, of the same day, how many degrees does the minute hand of a standard clock rotate?

1661 . Given AB = 4 & AC = 5, the perimeter of the ractangle is--

1662 . Given that, 24 carat gold is pure gold, 18 carat gold is 3/4th of pure gold and 20 carat gold is 5/6th of pure gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is -

1664 . Given that w + x = - 4, x + y = 25 and y + w = 15, what is the average (arithmetic mean) of w, x and y?

1665 . Given the equations below, what is the value of mn? 2(m + n) + m-9; 3m - 3n =24

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