1546 . How many liters of a 90% of concentrated acid needs to be mixed with a 75% Solution of concentrated acid to get a 30 liter Solution of 78% concentrated acid?

A. 8
B. 6
C. 7
D. 9

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Answer: Option B

Explanation:

1547 . How many liters of fuel are needed for a steamer to sail 2400 kilometers if it uses 40 liters of fuel to sail 320 kilometers?

A. 250
B. 255
C. 260
D. 300
E. None of these

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Answer: Option D

Explanation:

To sail 320 km it uses 40 litera fuel

To, 2400 km it uses ( 40×2400)/320 = 300 liters fuel

1548 . How many meters is one nautical mile ?

A. 1750.18 meters
B. 1853.18 meters
C. 1650.20 meters
D. 1953 .18 meters

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Answer: Option B

Explanation:

এক নটিক্যাল মাইল = ১.৮৫২ কিলোমিটার
১ কিলোমিটার = ১০০০ মিটার
১.৮৫২ কিলোমিটার = ১.৮৫২ × ১০০০ = ১৮৫২ মিটার

প্রধান প্রশাসনিক কর্মকর্তার কার্যালয় ( প্রতিরক্ষা মন্ত্রণালয়) সহকারী পরিচালক ০৫.০৪.২০১৯

A. Ten
B. Twenty-five
C. Fifty
D. None of these

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Answer: Option A

Explanation:

১ কোটি হলো ১০০ লাখ এর সমান।

১০ মিলিয়নে ১ কোটি।

১০০ কোটিতে ১ বিলিয়ন।

Bangladesh Bank - Assistant Director - 2001

A. 60/dm
B. d/m
C. dm/60
D. 60 d/m

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Answer: Option D

Explanation:

m mile can be travelled in 60 minutes

d mile can be travelled in (60 x d)/m minutes = 60d/m minutes.

1551 . How many numbers from 1 to 200 inclusive are equal to the cube of an integer?

A. 1
B. 2
C. 3
D. 4
E. None of these

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Answer: Option E

Explanation:

1³ = 1

2³ = 8

3³= 27

4³ = 64

5³ = 125

So, there are 5 integers

1552 . How many numbers from 11 to 50 are there which are exactly divisible by 7 not by 3?

A. 6
B. 5
C. 4
D. 2

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Answer: Option C

Explanation:

Speed of the train = 650/65 = 10 mps.
Speed of the man = 10/6 = 5/3 mps.
Time for the man to cross the platform = 240/(5/3) = 144 seconds = 2 minutes 24 seconds. Ans: D

সমন্বিত ব্যাংক অফিসার (ক্যাশ) || (02-06-2023)

A. 6
B. 8
C. 12
D. 15

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Answer: Option B

Explanation:

1×540 = 540

2×270 = 540

3×180 = 540

4×135 = 540

5×108 = 540

6×90 = 540

9×60 = 540

10×54 = 540

12×45 = 540

15×36 = 540

18×30 = 540

20×27 = 540

So the odd divisors are 1, 3, 5, 9, 15, 27, 45, 135.

So the number of odd divisors is 8.

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

A. 6
B. 8
C. 12
D. 15
E. 24

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Answer: Option B

Explanation:

1×540 = 540

2×270 = 540

3×180 = 540

4×135 = 540

5×108 = 540

6×90 = 540

9×60 = 540

10×54 = 540

12×45 = 540

15×36 = 540

18×30 = 540

20×27 = 540

So the odd divisors are 1, 3, 5, 9, 15, 27, 45, 135.

So the number of odd divisors is 8.

1555 . How many of the positive integers less than 25 are 2 less than an integer multiple of 4?

A. two
B. three
C. four
D. six

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Answer: Option D

Explanation:

1556 . How many pieces of 85 cm length can be cut from a rod 42.5 meters long?

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

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Answer: Option D

Explanation:

42.5 meters = 4250cm

টুকরার সংখ্যা = 4250/85 টি = 50 টি

1557 . How many pieces of 85 cm length stick can be cut from a 42.5 meters long stick?

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

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Answer: Option C

Explanation:

Given:

Length of the rod = 42.5 metres = 4250 cm

Pieces to be cut = 85 cm

Calculation:

Number of rods = 4250/85 = 50.

সমন্বিত ব্যাংক অফিসার (ক্যাশ) || (02-06-2023)

A. 6
B. 7
C. 5
D. 10

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Answer: Option B

Explanation:

1559 . How many positive integers less than 500 can we formed using the numbers 1,2,3 and 5 for the digit?

A. 48
B. 56
C. 62
D. 68

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Answer: Option D

Explanation:

To find the number of positive integers less than 500 that can be formed using the digits 1, 2, 3, and 5, we can consider the following cases:

Case 1: 1-digit numbers (1, 2, 3, and 5) There are 4 one-digit numbers.

Case 2: 2-digit numbers We can form 2-digit numbers using the digits 1, 2, 3, and 5. These numbers can be any permutation of the digits.

Number of 2-digit numbers = 4 choices for the tens digit (1, 2, 3, or 5) × 4 choices for the units digit (excluding 0) = 4 × 4 = 16 numbers

Case 3: 3-digit numbers We can form 3-digit numbers using the digits 1, 2, 3, and 5. These numbers can be any permutation of the digits.

Number of 3-digit numbers = 4 choices for the hundreds digit (1, 2, 3, or 5) × 4 choices for the tens digit (1, 2, 3, or 5) × 3 choices for the units digit (excluding the tens digit) = 4 × 4 × 3 = 48 numbers

Now, let's sum up the numbers from all the cases:

Total number of positive integers less than 500 = Case 1 + Case 2 + Case 3 = 4 + 16 + 48 = 68

So, there are 68 positive integers less than 500 that can be formed using the digits 1, 2, 3, and 5.

1560 . How many positive integers less than ten thousand are multiples of both right and eighteen?

A. 70
B. 72
C. 138
D. 139

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Answer: Option C

Explanation:

1546 . How many liters of a 90% of concentrated acid needs to be mixed with a 75% Solution of concentrated acid to get a 30 liter Solution of 78% concentrated acid?

1547 . How many liters of fuel are needed for a steamer to sail 2400 kilometers if it uses 40 liters of fuel to sail 320 kilometers?

1548 . How many meters is one nautical mile ?

1549 . How many millions marks a crore ?

1550 . How many minutes will it take police car to travel a distance of d miles if it travels at m mile per hour?

1551 . How many numbers from 1 to 200 inclusive are equal to the cube of an integer?

1552 . How many numbers from 11 to 50 are there which are exactly divisible by 7 not by 3?

1553 . How many odd, positive divisors does 540 have?

1554 . How many odd, positive divisors dose 540 have ?

1555 . How many of the positive integers less than 25 are 2 less than an integer multiple of 4?

1556 . How many pieces of 85 cm length can be cut from a rod 42.5 meters long?

1557 . How many pieces of 85 cm length stick can be cut from a 42.5 meters long stick?

1558 . How many positive integer less than 100 have the reminder of 2 when divided by --

1559 . How many positive integers less than 500 can we formed using the numbers 1,2,3 and 5 for the digit?

1560 . How many positive integers less than ten thousand are multiples of both right and eighteen?

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