7006 . If $a b c$ are positive real numbers, then $\sqrt{a^{- 1} b} \times \sqrt{b^{- 1} c \times} \sqrt{c^{- 1} a}$ is equal to:

A. 8
B. 1
D. 4

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Answer: Option B

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7007 . If $\frac{a}{b} = \frac{1}{3}, = 2, \frac{c}{d} = \frac{1}{2}, \frac{d}{e}$ 3 and $\frac{e}{f} = \frac{1}{4}$ , then what is the value of $\frac{a b c}{d e f}$ ?

A. $\frac{3}{8}$
B. $\frac{27}{8}$
C. $\frac{2}{8}$
D. $\frac{27}{4}$

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Answer: Option A

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বাংলাদেশ রপ্তানি প্রক্রিয়াকরণ কর্তৃপক্ষ (সহকারী ম্যানেজার) 02-04-2021 || 2021

A. 38
B. 122
C. 182
D. 22

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Answer: Option A

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ওয়েজ আর্নার্স কল্যাণ বোর্ড || উপ সহকারী পরিচালক (22-11-2024) || 2024

7009 . If $a = \frac{2}{7}, b = \frac{1}{3}, x = \frac{1}{8},$ the value of $y = a - 3 b + 16 x$ is

A. $\frac{16}{7}$
B. $\frac{9}{7}$
C. $\frac{7}{16}$
D. $1$

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Answer: Option B

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7010 . If $a^{4} + a^{2} b^{2} + b^{4} = a^{2} + a b + b^{2} = 3$ ,what is the value of $a^{2} + b^{2} ?$

A. 4
B. 6
C. 3
D. 2

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Answer: Option D

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প্রধান প্রশাসনিক কর্মকর্তার কার্যালয় ( প্রতিরক্ষা মন্ত্রণালয়) সহকারী পরিচালক ০৫.০৪.২০১৯

7011 . If $a^{2} + b^{2} = 5 a b,$ then value of $\frac{a^{2}}{b^{2}} + \frac{b^{2}}{a^{2}}$ is

A. 16
B. 23
C. -16
D. -23

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Answer: Option B

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বাংলাদেশ রপ্তানি প্রক্রিয়াকরণ কর্তৃপক্ষ (সহকারী ম্যানেজার) 02-04-2021 || 2021

A. 300
B. 350
C. 400
D. 450

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Answer: Option C

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বাংলাদেশ সেতু কর্তৃপক্ষ (সহকারী সাব-ইঞ্জিনিয়ার) 18-12-2020

A. 50
B. 110
C. 45
D. 60

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Answer: Option A

Explanation:

Purchase cost of pen = (55*100)/110

= 50 tk (Ans)

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পল্লী বিদ্যুতায়ন বোর্ড। এসিস্ট্যান্ট এনফোর্সমেন্ট কোঅডিনেটর। 31-12-2021

A. Tk. 10,000
B. Tk. 11,500
C. Tk. 10,500
D. Tk. 12,000

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Answer: Option A

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C ইউনিট ব্যবসা শিক্ষা (২০২৩-২০২৪) || (09-03-2024) || চট্টগ্রাম বিশ্ববিদ্যালয়

A. 0.8 mph
B. 1.6 mph
C. 2.4 mph
D. 3.2 mph

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Answer: Option B

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২৮ তম বিসিএস প্রিলিমিনারি টেস্ট (28-11-2008)

A. If A is a multiple of 5, then a is a multiple of 10.
B. If A is not a multiple of 5, then a is not a multiple of 10.
C. A necessary condition for A to be a multiple of 10 is that A is a multiple of 5.
D. A is multiple of 10 implies that a is a multiple of 5.

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Answer: Option A

Explanation:

অপশন a) কে ব্যাখ্যা করলে পাইঃ A যদি 5 এর গুণিতক হয়, অর্থাৎ A = 5, 10, 15, 20 হয়, তবে A অবশ্যই 10 এর গুণিতক হবে। না, তা বলা যায় না, কারণ A = 5, 10, 15, 20 হলে এর মধ্যে 5 রয়েছে যা 10 এর গুণিতক নয়।

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বাংলাদেশ অর্থনৈতিক অঞ্চল কর্তৃপক্ষ (সহকারী ব্যবস্থাপক) 25-09-2020

A. 4.2 km/hr
B. 9km/hr
C. 13km/hr
D. 21km/hr

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Answer: Option C

Explanation:

Let, the speed of the boat in still water is x km/hr

the speed of stream in 3 km/hr

So, Upstrem speed of boat is ( x - 3) km/hr

According to question,

Upstrem speed of boat is = 7/42 km/mint

= (7×60)/42 km/hours = 10km/hours

So, x - 3 = 10

x = 10 + 3 = 13 km/hr

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পল্লী কর্ম সহায়ক ফাউন্ডেশনের অ্যাসিসট্যান্ট ম্যানেজার-০৭.০৩.২০১৪

A. 45 deg
B. 22.5 deg
C. 65.5 deg
D. 85 deg

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Answer: Option C

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BCSIC নিয়োগ পরীক্ষা - ২০১৮ পদ: এক্সটেনশন অফিসার তারিখ: ০৯-১১-২০১৮

A. 16/7
B. 9/7
C. 7/16
D. 1

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Answer: Option B

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7020 . If a + b = 4 and ab = -12, then a - b equals to-

A. ± 8
B. ± 24
C. ± 2
D. ± 6

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Answer: Option A

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ওয়েজ আর্নার্স কল্যাণ বোর্ড || সহকারী পরিচালক (22-11-2024) || 2024

7008 . If a=4, b=5, c=3, what is the value of 4ab-6ac+2bc?

7012 . If a sum of taka invested amounts to BDT 460 in 3 years and amounts to BDT 500 in 5 years then what is thr invested sum in BDT?

7013 . If a pen is sold at taka 55 it makes a profit of 10%. What is its purchase cost?

7014 . If a mobile is sold at Tk. 11,000; there is a profit of 10%. What is the cost price of the mobile?

7015 . If a man swims 4 miters upstream at 1 mph and back downstream to the same point at 4 mph, what is his average speed?

7016 . If A is an integer, which of the following CANNOT be inferred from the statement above?

7017 . If a boat goes 7km upstream in 42 minutes and the speed of the stream is 3kmph,then the speed of the boat in still water is-

7018 . if A B C D and E are points in a plane such that the line CD bisects angle ACb and line CB bisects right angle ACE ,then DCE=?

7019 . If a = 2/7, b = 1/3 and c = 1/8, then value of y = a - 3b + 16c is--/যদি a = 2/7, b = 1/3 এবং c = 1/8 হয়, তবে y = a - 3b + 16c এর মান কত?

7020 . If a + b = 4 and ab = -12, then a - b equals to-

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