2056 . If machine A polishes x units in 12 minutes and machine B polishes 5x units in 40 minutes, in how many minutes will A and B. working together, polish 50x units?

A. 240
B. 300
C. 350
D. 120

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Answer: Option A

Explanation:

ATQ:

x/12 + 5x/40 = 50x/1

or, 10x+15x/120 = 50x/1

So, 240.

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সহকারী পরিচালক(AD) -12.11.2021

A. 20
B. 30
C. 40
D. 50

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Answer: Option B

Explanation:

Ler, Jamal = x

Mamun = x + 10

2 ( x + 10) = x + 40

x = 20

Now, Mamun is ( 20 + 10) = 30

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2058 . If Marie has twice as much money as Curie has, who has three times as much money as Sunny as has, what is the ratio of the amount of money Sunny has to the amount of money Marie has ?

A. 1 : 8
B. 1 : 6
C. 1 : 4
D. 1 : 2
E. 2 : 1

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Answer: Option B

Explanation:

Let, Sunny has $ X
:. Curie has $ 3X
:. Marie has $ (3X x 2) or $ 6X
:. The ratio of the amount of money Sunny has to the amount of money Marie has
= X:6X = X/6X = 1/6 = 1:6

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Bangladesh Bank - Assistant Director - 2006

A. (P+Q)/PQ days
B. PQ/(P+Q) days
C. (P+Q) days
D. (1/P + 1/Q) days

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Answer: Option B

Explanation:

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সমন্বিত ৭ ব্যাংক || অফিসার (ক্যাশ) (24-05-2024)

A. 12
B. 12mn
C. 12m + 12y

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Answer: Option A

Explanation:

mx + ny = 12my

mx + ny/my = 12

mx/my + ny/ my = 12

x/y + n/m = 12

এখানে, ১২ কে ফ্রি করার জন্য my দ্বারা উভয় পক্ষে ভাগ করে দেওয়া হয়েছে। তারপরে mx ও my পাবে এবং ny ও my পাবে তাই দুইটার নিচে দেওয়া হয়েছে এবং m আর m কাটে এবং y আর y কাটে।

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2061 . If n and p are both even number, which of the following number must be an odd number?

A. n +2p
B. np + 1
C. n + p
D. 2n + p

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Answer: Option B

Explanation:

Let, n = 3, p = 5

np + 2 = 17

again, n + p = 8

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2062 . If n and p are both odd numbers, which of the following must be an even number?

A. np + 2
B. n + p
C. n + p + 1
D. np

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Answer: Option B

Explanation:

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Bangladesh Bank - Assistant Director - 2009

A. NP
B. 2N + P
C. N + P
D. NP + 2

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Answer: Option C

Explanation:

as N and P both are odd numbers,

let, N = 3 and P = 5

so, N + P = 3 + 5 = 8 which is an even number.

so, N + P is even

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Sonali- Janata- Agrani &amp- Rupali Bank Ltd. Senior Officer Recruitment 14.03.2008

A. 1
B. 4
C. 7
D. 25
E. none of them

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Answer: Option A

Explanation:

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2065 . If n is a positive integer and n2 is divisible by 72, then what is the largest positive integer that must be a factor of n?

A. 6
B. 12
C. 24
D. 36
E. None of these

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Answer: Option B

Explanation:

Hintsh

n² এর মান 72 এর গুনিতক হবে।

n² এর মান হতে পারে : 72, 144, 216 প্রভৃতি

এখানে, 144 একটি পূর্ববর্গ সংখ্যা যার বর্গমূল 12।

12 ই নির্ণেয় সংখ্য

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2066 . If n is an even integer, which of the following must be an odd integer ?

A. n-2
B. n+2
C. 4n+1
D. 3n+1

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Answer: Option C

Explanation:

Let's say, n=2

So, 7(n+3)=7(2+3)=35, which is odd

(ans).

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অফিসার (জেনারেল) - 12.11.2021

2067 . If n is an even integer, which of the following must be an odd integer?

A. $n^{2} - n$
B. $n + 2$
C. $3 n - 1$
D. $3 n^{2}$

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Answer: Option C

Explanation:

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অফিসার (সাধারণ) ২৭.১২. ২০১৯

A. 7n - 2
B. 5(n - 2)
C. (16n + 24)/8
D. (6n + 12)/3

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Answer: Option C

Explanation:

Consider even integer= 2

Option A= (3×2−2)=4 = Even integer.

Option B= 2−2=0 =Even integer.

Option C= 3(2+1)=9 = Odd integer

Option D= 2×2=4 = Even integer.

∴ Correct answer is option C.

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2069 . If n is an integer between 0 and 100, then any of the following could (3n+3) except ---

A. 300
B. 297
C. 208
D. 63

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Answer: Option D

Explanation:

63 = 3*20 + 3; N = 20
297 = 3*98 + 3; N = 98

300 = 3*99 + 3; N = 99

208 = 3*69 + 1 Not (3n + 3)

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2070 . If n is any negative number, which of the following must be positive?

A. n/2
B. 2n
C. n +2
D. n -2
E. 2 -n

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Answer: Option E

Explanation:

Let's say, n=-1

So,

2-n

=2-(-1)

=2+1

=3, which is positive (ans)

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2056 . If machine A polishes x units in 12 minutes and machine B polishes 5x units in 40 minutes, in how many minutes will A and B. working together, polish 50x units?

2057 . If Mamun were twice as old as he is now, he would be 40 years older than Jamal. If Jamal is 10 years younger than Mamun, How old is Mamun?

2058 . If Marie has twice as much money as Curie has, who has three times as much money as Sunny as has, what is the ratio of the amount of money Sunny has to the amount of money Marie has ?

2059 . If Masud can do a job in P days, while Minhaz can do the same job in Q days separately, how long will it take to finish the job if they work together?

2060 . If mx+ny=12my, then x/y+n/m= ?

2061 . If n and p are both even number, which of the following number must be an odd number?

2062 . If n and p are both odd numbers, which of the following must be an even number?

2063 . If N and P are odd numbers then which of the following must be even number?

2064 . If n is a positive integer and k+2=3n, which of the following could be a value of k?

2065 . If n is a positive integer and n2 is divisible by 72, then what is the largest positive integer that must be a factor of n?

2066 . If n is an even integer, which of the following must be an odd integer ?

2068 . If n is an even integer which of the following must be an odd integer?

Consider even integer= 2

2069 . If n is an integer between 0 and 100, then any of the following could (3n+3) except ---

2070 . If n is any negative number, which of the following must be positive?

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