973
6973
5994
None of these
28
32
40
64
1.001
1.011
1.003
1.111
+
-
*
/
12
15
25
32
14.5
75.69
145
210.25
5
10
20
30
51
61
71
81
45
54
56
65
প্রশ্নঃ A two-digit number becomes five-sixth of itself when its digits are reversed. Two digits differ by one. The number is :
বর্ণনাঃ
Hints: When the digits are reversed, the number become 5/6 th of itself, lesser. So the units place digit is smaller.
Let, units place digit is x, so 10th place is x+1, as the two digits differ by 1.
5/6 { 10(x+1) +x} = 10x +x +1
5 (11x +10) =6(11x +1)
55x +50 =66x +6
11x =44
x =4
The number is = 10(4+1) = 10×5+4 =54
3 : 4
3 : 5
4 : 3
None of these
প্রশ্নঃ The ratio between the present ages of P and Q is 6 : 7. If Q is 4 years older than P, what will be the ratio of the ages of P and Q after 4 years?
বর্ণনাঃ
Hints: Let P age and Q age be 6x years and 7x years
Then, 7x - 6x =4
x = 4
So the required ratio will be (6x+4)/(7x+4) = 28/32 = 7/8
12.75
85
204
None of these
Tk. 920
Tk. 960
Tk. 1060
Tk.1200
প্রশ্নঃ The profit earned by selling an article for Tk. 832 is equal to the loss incurred when the same article is sold for Tk. 448. What should be the sale price for making 50% profit?
বর্ণনাঃ
Hints: Let, cost price be TK x
Then, (832 -x) /x ×100 = (x-448)/x ×100
832 - x = x- 448
2x = 1280
x = 640
Profit = 50% of TK 640 = Tk.( 50/100)×640 = TK 320
So, the required sales price is (640 + 320) Tk. = Tk. 960
9, 12, 21
15, 20, 25
18, 24, 42
None of these
প্রশ্নঃ The ratio of three numbers is 3 : 4 : 7 and their product is 18144. The numbers are :
বর্ণনাঃ
Hints: Let the number be x
So, the three numbers will be 3x, 4x, and 7x
Now, 3x × 4x × 7x = 18144
84x3 = 18144
x3 = 216
x3 = 63
x = 6
Hence, the numbers are 18, 24, 42
3 : 4
3 : 5
15 : 23
None of these
5 days
6 days
8 days
9 days
2
2.5
3
3.5
প্রশ্নঃ Pipe A can fill a tank in 5 hours, pipe B in 10 hours and pipe C in 30 hours. If all the pipes are open, in how many will the tank be filled?
বর্ণনাঃ
Hints: Pipe A, B, and C can fill the tank in 1 hour
( 1/5 +1/10 + 1/30) portion
= (12+6+2)/6o portion
= 20/60 portion
= 1/3 portion
All three pipes will fill the tank in 3 hours.
20 km/hr
24 km/hr
28.5 km/hr
30 km/hr
9.8 sec
12.1 sec
12.42 sec
14.3 sec
প্রশ্নঃ How long does a train 110 metres long running at the speed of 72 km/hr take to cross a bridge 132 metres in length?
বর্ণনাঃ
Hints: To convert km/hr into m/s, multiply with 5/18
So, 72km/hr = (72×5)/ 18 m/s = 20 m/s
Time required to cross the bridge = (110+132)/20 seconds = 12.1 seconds
3
5
8
9
3.6
6
18
None of these
প্রশ্নঃ Reena took a loan of Tk. 1200 with simple interest for as many years as the rate of interest. If she paid Tk. 432 as interest at the end of the loan period, what was the rate of interest?
বর্ণনাঃ
Hints : Let, rate = R% and time = R years
Then, ( 1200×R×R)/100 = 432 [ I= pnr]
12R2 = 432
R2 = 36
R = 6
6%
6.5%
7%
7.5%
Tk. 15,000
Tk. 15,550
Tk. 15,600
Tk. 16,500
প্রশ্নঃ The length of a room is 5.5 m and width is 3.75 m. Find the cost of paying the floor by slabs at the rate of Tk. 800 per sq. metre.
বর্ণনাঃ
Hints: Length = 5.5m and width = 3.75 m
Area = 5.5×3.75 sq.m = 20.625 sq.m
Cost of paying =800×20.625 = 16500 Tk.
20 m
25 m
22.5 m
9 m
20
21
22
24
Tk. 37.50
Tk. 40
Tk. 48
Tk. 52
প্রশ্নঃ A man buys Tk. 50 shares in a company which pays 10% dividend. If the man gets 12.5% on his investment, at what price did he buy the shares?
বর্ণনাঃ
Hints: Dividend on 1 share = (50×10%) Tk
= 50 ×(10/100) = 5 Tk.
Tk. 12.5 is an income on an investment of Tk. 100
Tk. 5 is an income on an investment of Tk (100×5) / 12.5 = 40
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