২২৪৩১
If a, b, and c are three different positive integers less then 10 and greater than 0 , what is the greatest possible value of the expression (a -b)/c?
উত্তর
7
সমাধান
Let, a = 9b= 2c= 1 So, (a-b)/c = (9-2)/1 = 7 Here if I take b=1 and c=2 then the value will be (a-b)/c = (9-1)/2 =4 and it Won't be the greatest value so, 7 Will be the answer.
২২৪৩২
In a certain school , 40% of the students are boys. If 20% of the boys and 10% of the girls went on a field trip, what percentage of the total students went to the field trip?
উত্তর
14%
সমাধান
Boys = 40% of the students
Girls = 100 - 40 = 60% of the students
Boys went to the field trip = 20% of 40% of students = 20/100 of 40% of students = 8%
Girls went to the field trip = 10% of 60% of students = 10/100 of 60% of students = 6%
Total students went to the field trip = 8% + 6% = 14%
২২৪৩৩
In a certain country, a person is born every 4 second and person dies every 10 seconds. Therefore , the birth and death rates account for a population growth rate of one person every--
উত্তর
6.67 seconds
সমাধান
LCM of 4 & 10 is 40.
10 persons are born in every 40 seconds.
4 persons die every 40 second.
Population growth rate = 6 persons every 40 seconds = 1 person every (40/6 = 6.67) seconds
২২৪৩৪
If Mr. Azad can save Tk. 380 in five weeks , in how many weeks m at this same rate, can he save 2.6 times of this amount?
উত্তর
13 weeks
সমাধান
Time needed 2.6 times more to save 2.6 times more money.
So, required time = 2.6 x 5 weeks = 13 weeks
২২৪৩৫
C is a circle , L is a line,and P is a point on line L. If C, L, and P are in the same plane and P is inside C, how many points do C and L have in common
উত্তর
2
২২৪৩৬
If k is divisible by 2, 3 and 15, which of the following is also divisible by these numbers?
উত্তর
K+30
সমাধান
Only the number 30 from the options is divisible by 2, 3 and 15. As 'K' is divisible by 2, 3 and 15, (K + 30) is also divisible by these numbers.
২২৪৩৭
If 4 times an integer x is increased by 10 , the result is always greater than 18 and less than 34. what is the least value of x?
উত্তর
5
সমাধান
You have to go through the options here to find out the answer.
Option 1:
2*4 + 10 = 18
This is not greater than 18.
Option 2:
3*4 + 10 = 22
This is greater than 18 and less than 34.
Plus, this is the lowest integer that follows the given conditions.
২২৪৩৮
A restaurant meal costs Tk. 35.50 and there was no tax. If the tip was more than 10 percent but less than 15 percent of the cost of the meal, then the total amount paid must have been between ---
উত্তর
Tk. 39 & Tk. 41
সমাধান
let, Tip = t
10
২২৪৩৯
For some value of x , 5(x+2) =y. After the value of x is increased by ,3 5(x+2) =z. what is the value of (z -y)?
উত্তর
15
সমাধান
Here, y = 5(x + 2)
z = 5(x + 3 + 2) [using x + 3 in place of x]
Now, z - y = 5(x + 5) - 5(x + 2) = 5x + 25 - 5x - 10 = 15
২২৪৪০
Barkat bought equal numbers of 2-paisa and 30-paisa stamps. If the total cost of the stamps was Tk. 10.00, what was the total number of stamps bought?
উত্তর
40
সমাধান
***The question is erroneous.
Let the number of each type stamps is S.
Now, 10 TK = 10 x 100 paisa = 1000 paisa
So, 20S + 30S = 1000
or, 50S = 1000
or, S = 100/50 = 20
So, the number of total stamps = 20 + 20 = 40