২৩১২১
A class of 80 students has 25% girls. If 10% of the boys and 20% of the girls attended a picnic then what percentage of the class attended the picnic?
উত্তর
12.5%
২৩১২২
A man walked 2 km east, then 2 km south, then again 4 km east and finally 10 km north. How far in a straight line did he walk from the starting point?
উত্তর
10
২৩১২৩
A retailer buys a radio from the wholesaler for TK.80. He then marks up the price by 25% and sales at a discount of 10%. What is his profit on the radio?
উত্তর
TK. 10
সমাধান
Time is an abstract concept, it does not have a body. So, it can not be contained “in” a watch or anything else. The correct usage is, “shown/displayed by your watch.
২৩১২৪
কিলোমিটার সমান কত মাইল?
উত্তর
0.62
সমাধান
মেট্রিক পদ্ধতিতে'
এক কিলোমিটার = ০.৬২১ মাইল
= ১০৯৪ গজ
= ৩২৮১ ফুট
২৩১২৬
Nader drove from Mymensingh to Dhaka at 60 miles/hour. Returning over the same route , there was a lot of traffic , and he was only able to drive at 40 miles/hour. If the return trip took 1 hour longer, what is the distance between Dhaka and Mymensingh?
উত্তর
120 miles
সমাধান
Let, s = distance between Dhaka to Mymensingh.
t = time taken to travel from Mymensingh to Dhaka
V = velocity
We have s = vt
Hare s(distance) is constant
ATQ
v×t = v1×t1
60t = 40(t + 1)
t = 20
So s = 60×20 = 120 mile
Ans. 120 mile
২৩১২৭
In a school cricket team, players are selected from both junior section and senior section. If the ratio of juniors to seniors in the team is 3:5 , what percentage of the team members are seniors?
উত্তর
62.5%
সমাধান
Sum of the whole ratio (3 + 5) = 8
Percentage of the seniors in the team = (5/8)*100% = 62.5%
২৩১২৮
Rahim has three times as much money as Karim has. If Rahim gives Karim TK.50 then Karim will have three times as much money as Rahim will have. How much money do they have together?
উত্তর
100
সমাধান
প্রশ্নঃ Rahim has three times as much money as Karim has. If Rahim gives Karim TK.50 then Karim will have three times as much money as Rahim will have. How much money do they have together ?
বর্ণনাঃCase 1: Rahim has three times as much money as Karim has. let, karim's money = x, so rahim's money = 3xCase 2: If Rahim gives Karim TK.50 then Karim will have three times as much money as Rahim will have.After the condition - Rahim gives Karim TK.50Karim's money = x + 50 & rahim's money = 3x - 50After the condition - Karim will have three times as much money as Rahim will have,karim's maney = 3 * rahim's moneyor, x + 50 = 3(3x - 50)or, x + 50 = 9x - 150or, 8x = 200so, x = 25So, The money do they have together is: x + 3x = 4x = 4*25 = 100 Answer: 100
২৩১২৯
Zarina has started a wholesale jewelary making business. She makes 36 bracelets a day, and sells them to local shops for TK.180 a dozen. How much does Zarina make per week if she works 5 days a week?
উত্তর
TK. 2,700
সমাধান
She makes 36 pieces
12 pieces = 1 dozen
36 pieces = 3 dozen
So, she sales per day (180*3) = 540 Tk
As she works for 5 days in a week, so she can sale (540*5) = 2700 tk per week
২৩১৩০
If Bashar can run around a ground four times in 20 minutes and Rahim can run around the same ground three times in 12 minutes, who can run around that ground more times in an hour, and how many times more can he run around?
উত্তর
Rahim , three times more
সমাধান
rounds of bashar at one hr = (4*60)/20 = 12
rounds of rahim at one hr = (3*60)/12 = 15
difference = 15 - 12 = 3,
ans: Rahim, three times