২২৬২১
Mr.Karim wants to put up fencing around three sides of his rectangular yard and leave a side of 10 feet unfenced. If the yard has an area of 340 sq. feet, how many feet of fencing does he need?
উত্তর
None of these
সমাধান
Area, Length×Width = 340
or, Lenght×10 = 340
So, Length = 340/10 = 34 feet
Fencing needed = 34 + 34 + 10 = 78 feet
২২৬২২
If x>y and y is a positive integer, which of the following cannot be true?
উত্তর
y/x >1
সমাধান
Here, x/y>1 and y is a positive integer.For example, if x=3 and y=2 then 3/2>1so y/x or, ⅔ can never be greater than 1
২২৬২৩
0.03 times.05 is ---
উত্তর
0.15%
সমাধান
০.০৩ × ০.০৫ = ০.০০১৫
এখানে, ৩ আর ৫ গুণ করলে ১৫ হয় এবং চারটা সংখ্যার আগে পয়েন্ট তাই। ০.০০১৫ হয়ছে চাররা সংখ্যর আগে পয়েন্ট দেওয়া হয়ছে ।
২২৬২৪
If the length of rectangle A is one -half of the length of rectangle B , and the width of rectangle A is one -half of the width of rectangle B, what is the ratio of the area of rectangle A to the area of rectangle B?
উত্তর
1/4
সমাধান
Rectangle B এর length = l,width = w, তাহলে A এর হবে 121,12w
∴ area এর অনুপাত = 121×12w1×w = 14
২২৬২৫
A sum of money is divided among Nyla, Shaminn and Raqib in such way that Nyla gets half the amount, Sharmin gets 3/4 of Nyla's share and Raqib ends up with 40. What is the total amount?
উত্তর
320
সমাধান
Let the total amount be T.
Nyla gets = T/2
Sharmin gets = 3/4 of T/2 = 3T/8
Rakib gets = T - (T/2 + 3T/8) = T - 7T/8 = T/8
Now, T/8 = 40
So, T = 40×8 = 320 TK
২২৬২৬
If w is 10% less than x, and y is 30% less than Z, then why is what percent less than xz?
উত্তর
37%
সমাধান
w = x - 10% of x
w = .9x
and y = z - 30% of z = .7z
⸫ wy = .63xz = (1 - .37)xz
অর্থাৎ 7% less
২২৬২৭
5% of which number is 25?
উত্তর
500
সমাধান
Let the number be X.
So, 5% of X = 25
or, 5/100 of X = 25
or, X = 25×100/5 = 500
২২৬২৮
A tree increases annually by 1/8 of its height. By how much will it increase after 2 years, if it stands today 64 cm high?
উত্তর
81 cm
সমাধান
প্রতি বছর height এর 18 বাড়ে
১ম বছর পরে height = 64 + 64×18 = 64 + 8 = 72 cm
২য় বছর পরে = 72 + 72×18 = 72 + 9 = 81 cm
২২৬২৯
If 15 men working at same rate can make 27 baskets in an hour, how many baskets would 45 workers make in 40 minutes?
উত্তর
54
সমাধান
15 men working 60 minutes(1hr) can make 27 baskets
45 men working for 40 minutes can make = 27×45×40 / (15×60) = 54
২২৬৩০
The width of a rectangular field is 1/3 rd its length. What is the area of the field in square yards if its length is 120 yards?
উত্তর
4800
সমাধান
Width = 1/3 of 120 = 40 yards
Area = Length×Width = 120×40 = 4800 sq. yards