1711 . How many spokes are there in a wheel of a car, if any two spokes from an angle of 15°?

A. 12
B. 15
C. 22
D. 24

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Answer: Option D

Explanation:

All the spokes will form a total angle of 360°. Two consecutive spokes form an angle of 15° but every spoke takes part in forming two such angles. So, the number of spokes will be equal to the number of 15° angles formed.

So, the number of spokes will be = 360/15 = 24

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1712 . How many square centimeters of construction paper Jesmin needs in order to exactly cover, with no overlap, 5 sides of a cube with edges that are 12 centimeters long?

A. 60
B. 144
C. 300
D. 720

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Answer: Option D

Explanation:

Length of side =a=12cm

Area of one face of cube =a²=122 =144cm²

⇒ Area of 5 faces of cube = 5a² = 5×144 = 720cm²

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1713 . How many squares of 2 inch dimension will be required to cover a rectangle of 8 inch breadth and 6 inch length ?

A. 7
B. 24
C. 12
D. none of these

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Answer: Option C

Explanation:

Number of squares needed

=area of rectangle/area of square

=(8×6)/(2×2)

=48/4

=12

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1714 . How many students can sit in a room with n single chairs and b doubleseated benches?

A. nb
B. 2nd
C. 2(b+n)
D. 2b + n
E. None of these

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Answer: Option D

Explanation:

In 1 single chair seated 1 student

So, in n single chair seated = 1 × n= n students

Again,

In 1 bench, seated 2 students

So, in b bench seated = 2 × b = 2b students

So Total number of Student can be seated in this classroom is = 2b + n

Ans: 2b+n

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1715 . How many terms are there in 20, 25, 30......140?

A. 22
B. 25
C. 23
D. 24

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Answer: Option B

Explanation:

To find the number of terms in the sequence 20, 25, 30, ..., 140, we can use the formula for the nth term of an arithmetic progression:

nth term (Tn) = a + (n - 1) * d

Where:

a is the first term of the sequence (a = 20 in this case).
d is the common difference between consecutive terms (d = 25 - 20 = 5 in this case).
n is the number of terms we want to find.
We need to find the value of n when Tn is equal to 140, as that's the last term in the sequence.

140 = 20 + (n - 1) * 5

Now, solve for n:

140 - 20 = (n - 1) * 5 120 = (n - 1) * 5

Divide both sides by 5:

120/5 = (n - 1) 24 = n - 1

Now, add 1 to both sides:

n = 24 + 1 n = 25

So, there are 25 terms in the sequence 20, 25, 30, ..., 140. The correct answer is 25.

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সমন্বিত পাঁচ ব্যাংক || অফিসার ক্যাশ - 06.11.2021

A. 10
B. 15
C. 22
D. 27

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Answer: Option B

Explanation:

আমরা জানি, n তম পদের সমষ্টি Sn= n/2{2a+(n-1)d}

এখানে, a=21, d= 18-21= -3, Sn= 0, n=?

প্রশ্নমতে, 0= n/2{(2×21)+(n-1)-3}

বা, n/2(42-3n+3)=0

বা, 45-3n= 0×2/n

বা, 45-3n= 0

বা, 3n=45

বা, n=15

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Sonali Bank Ltd. Senior Officer Recruitment 01.06.2018

A. 36
B. 37
C. 72
D. 74

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Answer: Option C

Explanation:

We have to form a border around the room of 24 * 14.

Also, since room is 24 feet wide in length, we can place 24 tiles on both the sides.

that makes it 48.

we are left with width which is 14 feet.

But out of that we have already placed tiles in 2 feet on both the side while filling up the place for length.

So what we are left with is = 14 + 14 - 2 - 2 = 24

and 24 + 48 = 72

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1718 . How many tiles each a square tile of 2 inch sides are needed to cover a rectangle floor of 4 feet long and 6 feet wide?

A. 24
B. 128
C. 96
D. 864

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Answer: Option D

Explanation:

Measurements of the floor are 4 feet or 48 inches and 6 feet or 72 inches.

So, area of the floor = 48 x 72 = 3456 sq in

Area of each tiles = 2 x 2 = 4 sq in

Number of tiles needed = 3456/4 = 864

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1719 . How many tiles each of 1 square foot are necessary to form a 1 foot border around the inside of a 24 feet by 14 feet room?

A. 36
B. 37
C. 72
D. 74
E. None of these

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Answer: Option C

Explanation:

Area of the total room = 24 x 14 = 336 sq ft

Measurements of the room without the border will be (24 - 1x2) = 22 ft by (14 - 1x2) = 12 ft.

Therefore, Area of the room without the border = 22 x 12 = 264 sq ft

So, the area of the border = 336 - 264 = 72 sq ft.

Then, the number of tiles required = 72/1 = 72.

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1720 . How many times are the hands of a clock at right angle in a day?

A. 22
B. 24
C. 44
D. 48
E. None of these

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Answer: Option C

Explanation:

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সাধারণ বীমা কর্পোরেশন || সহকারী ব্যবস্থাপক (08-11-2024) || 2024

A. 20
B. 21
C. 22
D. 24

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Answer: Option C

Explanation:

In 24 hours, the hands coincide or are in opposite direction 44 times a day

So, in 12 hours=44/2=22 times

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1722 . How many times does the digit '4' come to write numbers from 1 to 100?

A. 10
B. 11
C. 19
D. 20
E. None of these

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Answer: Option C

Explanation:

The digit four appears once in each of the following: 4, 14, 24, 34, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 54, 64, 74, 84 and 94

4 comes 1 to 100 is 20 times

So, 4 comes 10 to 100 is (20 - 1) = 19 times

ans: for a total of 19 times.

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পল্লী কর্ম সহায়ক ফাউন্ডেশন সহকারী ব্যবস্থাপক ০২. ০৮.২০১৯

A. 10
B. 11
C. 15
D. 19

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Answer: Option D

Explanation:

14, 24, 34, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 54, 64, 74, 84, 94 = > 19 times. ans.

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1724 . How many times in a day, are the hands of a cock in straight line but opposite in direction ?

A. 22
B. 24
C. 48
D. 20

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Answer: Option A

Explanation:

Its a general knowledge type question. Though one can calculate it by thinking, its 22 tims.

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Bangladesh Bank - Officer(Cash) - 2016

A. 22
B. 24
C. 48
D. 44

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Answer: Option A

Explanation:

In 24 hours, the hands coincide or are in opposite direction 44 times a day

So, in 12 hours=44/2=22 times

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1711 . How many spokes are there in a wheel of a car, if any two spokes from an angle of 15°?

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1712 . How many square centimeters of construction paper Jesmin needs in order to exactly cover, with no overlap, 5 sides of a cube with edges that are 12 centimeters long?

1713 . How many squares of 2 inch dimension will be required to cover a rectangle of 8 inch breadth and 6 inch length ?

1714 . How many students can sit in a room with n single chairs and b doubleseated benches?

1715 . How many terms are there in 20, 25, 30......140?

1716 . how many terms of arithmetic progression (A.P) 21,18,15,12...must be taken to give the sum zero

1717 . How many tiles each 1 foot square are necessary to form a 1 foot border around the inside of a room 24 feet by 14 feet?

1718 . How many tiles each a square tile of 2 inch sides are needed to cover a rectangle floor of 4 feet long and 6 feet wide?

1719 . How many tiles each of 1 square foot are necessary to form a 1 foot border around the inside of a 24 feet by 14 feet room?

1720 . How many times are the hands of a clock at right angle in a day?

1721 . How many times do the hands of a clock coincide in a day?

1722 . How many times does the digit '4' come to write numbers from 1 to 100?

1723 . How many times does the digit '4' come write numbers form 10 to 100 ?

1724 . How many times in a day, are the hands of a cock in straight line but opposite in direction ?

1725 . How many times in a day, the hands of a clock are straight ?

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