২২১৭১
If 10 students scored 61, how many students scored 62 or more marks?
উত্তর
25
সমাধান
There is given a table of Mark distribution 35-48, 49-60, 61-75, 76-88, 89-100No. Of students: 11, 25, 21, 9, 5Solution : Given that 10 students score 61, then rest (21-10)=11 students scores range 62 to 75.Though 76 to 100 are more than 62, so we took the number of rest students. So, total number of students who score 62 or more is (11+9+5)=25.Our answer is 25.
২২১৭২
A tank is 30% full with water. If 18 liters of water is added, the tank becomes 3/4 full. What is the capacity of the tank?
উত্তর
40
সমাধান
3/4 ≡ 3/4 x 100% = 75%
Change in = 75% - 30% = 45%
Now, 45% capacity = 18 liter
So, 100% capacity = 18 x 100 / 45 = 40 liter
২২১৭৩
If a mark of 76 or higher represents an A grade, then to the nearest percent, what percent of students received an A?
উত্তর
20%
২২১৭৪
If the individual marks of all the students are arranged in increasing order, which of the following is a possible mark for the 36th position in the list?
উত্তর
60
২২১৭৫
If x-3y=3 and 2x+9y=11, then what are the values of x and y?
উত্তর
4, 1/3
সমাধান
x - 3y = 3 or, x = 3y + 3 - - - - - - - (i)
2x + 9y = 11
or, 2(3y + 3) + 9y = 11
or, 6y + 6 + 9y = 11
or, 15y = 11 - 6
or, y = 5/15 = 1/3
Now, x = 3y + 3 = 3 x 1/3 + 3 = 4
So, (x, y) = (4, 1/3).
২২১৭৬
some zings are zangs. Some zangs are zongs. Which of the following can we conclude for sure?
উত্তর
Some zangs are zings
সমাধান
Here, Zing=zang zang=zongso zang cant be zing
২২১৭৭
'C' is the midpoint of the line segment AE. Points B and D are on the line segment AE so that AB=BC and CD=DE, what percentage of AC is AD?
উত্তর
150
সমাধান
Here, B is the midpoint of AC and D is the midpoint of CD. So, AB = BC = CD = DE
Now, AC = AB + BC = 2AB
And, AD = AB + BC + CD = 3AB = 3/2 x 2AB = 3/2 AC
So, AD = 3/2 x 100% of AC = 150% of AC.
২২১৭৮
If x>w, y>q, s>w, and w>y, which of the following must be true? 1. x>s 2. s>q 3. x>y
উত্তর
2 and 3
সমাধান
We can make the following deductions from the given information:Since x > w and w > y, we can conclude that x > y.Since y > q, we can conclude that s > q.Since s > w and w > y, we can conclude that s > y.Therefore, the statements that must be true are:x > s or s > x (We cannot determine the relationship between x and s based on the given information. Therefore, this statement is not necessarily true.)s > q (This statement is true based on the given information.)x > y (This statement is always true based on the given information.So, the correct answer is options 2 and 3.
২২১৭৯
Starting from point A, Kashem walked 300 meters towards North to B and then walked another 400 meters towards East to C. What is the shortest distance between C and A?
উত্তর
500
সমাধান
Points A, B & C make a right - angled triangle.
The shortest distance between C & A is CA.
Now, CA = (AB2 + BC2)1/2 = (3002 + 4002)1/2 = 500 m
২২১৮০
৮, ১১, ১৭, ২৯, ৫৩.............. ধারাটির পরবর্তী সংখ্যা কত?
উত্তর
101
সমাধান
৮ + ৩ = ১১
১১ + ৬ = ১৭
১৭ + ১২ = ২৯
২৯ + ২৪ = ৫৩
৫৩ + ৪৮ = ১০১