3436 . What is the probability of getting a sum of six if two dices are thrown at once?

A. 5/36
B. 7/36
C. 2/36
D. 1/36

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Answer: Option A

Explanation:

3437 . What is the probability that product of two integers (not necessarily different integers ) randomly selected from the numbers 1 to 20, inclusive , is odd ?

A. 1/3
B. 1/4
C. 1/2
D. 1/5

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Answer: Option B

Explanation:

Total integers; 20
even = odd = 10
Since odd x odd = odd and since half the integers 1 to 20 are odd, the probability of selecting two odd integers is 1/2 x 1/2 = 1/4.

3438 . What is the product of (6a2b3c4) and (3a3b4c)?

A. 9a5b7c4
B. 9a5b7c5
C. 18a5b7c5
D. 18a5b7c4

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Answer: Option C

Explanation:

3439 . What is the product of all the numbers in the dial of a telephone?

A. 1,58,480
B. 1,59,450
C. 1,59,480
D. 1,59,400
E. None of these

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Answer: Option E

Explanation:

0 (zero) is included in the dial, and product of any number and zero is zero.

3440 . What is the product of the odd integers between - 8 and 8?

A. 11025
B. 5005
D. 10050

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Answer: Option A

Explanation:

- 8 থেকে 8 পর্যন্ত বিজোড় স্বাভাবিক সংখ্যাগুলো হলো - - 7, - 5, - 3, - 1,1,3,5,7। সুতরাং এদের গুণফল = (−7)×(−5)×(−3)×(−1)×1×3×5×7-7×-5×-3×-1×1×3×5×7 = 11025

3441 . What is the rate of discount if a car that had a regular price of Tk. 30,00,000 is sold for Tk. 27,90,000?

A. 7%
B. 8%
C. 9%
D. 10%

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Answer: Option A

Explanation:

Bangladesh Bank - Assistant Director - 2001

A. 4%
B. 5%
C. 3%
D. 6%

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Answer: Option B

Explanation:

Original sum = Tk. 360
Total interest in 9 years = 540 - 360 = 180
Interest in last 5 years = 5 x 6 = 30%
= 30/100 x 360 = Tk. 108
= > Interest in first four years : 180 - 108 = Tk. 72 Interest per annum = 72/4 = 18
Rate of interest for first four years = 18/360 x 100 = 5%

সমন্বিত ৬ (ব্যাংক) ও ২ টি আর্থিক প্রতিষ্ঠান - সিনিয়র অফিসার ১০.০৬.২০১৯

A. 5
B. -5
C. 1/5
D. -1/5

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Answer: Option C

Explanation:

y = - 5x + 9

y + 5x = 9....... (1)

সুতরাং, (১) নং রেখাটির লম্বরেখার সমীকরণ 5y - x = k

y = x/5 + k

লম্ব রেখাট ঢাল = 1/5 .

Assistant Director (General) 06.07.18

A. 182
B. 62
C. 422
D. 362

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Answer: Option A

Explanation:

3445 . What is the smallest number that should be added to 100 so that it can be completely divided by all the prime numbers between 10 to 15 ?

A. 43
B. 6
C. 9
D. 1/3

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Answer: Option A

Explanation:

আমরা জানি, 10 থেকে 15 এর মধ্যে অবস্থিত মৌলিক সংখ্যাগুলো হলো 11 এবং 13। এখন 11 এবং 13 এর ল. সা. গু. হলো 143 । সুতরাং (143       –       100)  =  43 । 
∴∴ 100 এর সাথে কমপক্ষে 43 যোগ করলে তা11 এবং13 দ্বারা বিভাজ্য হবে।

3446 . What is the smallest number that should be added to 4456 so that the sum is completely divisible by 6?

A. 2
B. 3
C. 4
D. 5
E. None of these

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Answer: Option A

Explanation:

The diviisible smallest number = ( 4456 + 2)/6 = 743

so required smallest number is 2.

3447 . What is the square root of 0.16?

A. 0.004
B. 0.04
C. 0.4
D. 4

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Answer: Option C

Explanation:

0.16=16100.

⇒√0.16=√16100.

⇒√16100=±410=±25←note plus or minus.

⇒√0.16=±25=±0.4.

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

A. 1/2
B. 8/10
C. 5/16
D. 9/10
E. None of these

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Answer: Option D

Explanation:

0.15 + 0.10 + 0.65 = 15/100 + 10/100 + 65/100 = 3/20 + 1/10 + 13/20 = (3 + 2 + 13)/20 = 18/20 = 9/10

3449 . What is the sum of the following series? 1+2+3.........+100=?

A. 5500
B. 5050
C. 5055
D. 5850

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Answer: Option B

Explanation:

3450 . What is the sum of the squares of the digits from 1 to 9

A. 260
B. 105
C. 285
D. 385

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Answer: Option C

Explanation:

12 + 22 + 32 + ........ + 92

n সংখ্যক স্বাভাবিক সংখ্যার বর্গের সমষ্টি = n(n + 1)(2n + 1) /6 = 9(9 + 1) ( 2×9 + 1)/6 = 9×10×19/6 = 285

3436 . What is the probability of getting a sum of six if two dices are thrown at once?

3437 . What is the probability that product of two integers (not necessarily different integers ) randomly selected from the numbers 1 to 20, inclusive , is odd ?

3438 . What is the product of (6a2b3c4) and (3a3b4c)?

3439 . What is the product of all the numbers in the dial of a telephone?

3440 . What is the product of the odd integers between - 8 and 8?

3441 . What is the rate of discount if a car that had a regular price of Tk. 30,00,000 is sold for Tk. 27,90,000?

3442 . What is the rate of simple interest for the first 4 years if the sum of TK. 360 becomes TK. 540 in 9 years and the rate of interest for the last 5 years is 6% ?

3443 . what is the slope of the line perpendicular to the line y = -5x +9 ?

3444 . What is the smallest number of apples that can be distributed equally among 4, 6, 9 or 15 students having a surplus of two apples each time?

3445 . What is the smallest number that should be added to 100 so that it can be completely divided by all the prime numbers between 10 to 15 ?

3446 . What is the smallest number that should be added to 4456 so that the sum is completely divisible by 6?

3447 . What is the square root of 0.16?

3448 . What is the sum of 0.15, 0.10 and 0.65?

3449 . What is the sum of the following series? 1+2+3.........+100=?

3450 . What is the sum of the squares of the digits from 1 to 9

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