৫৬৮১
In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, then the present age of B is-
উত্তর
39 years
৫৬৮২
A natural number when increased by 12, equals 160 times reciprocal. The number is-
উত্তর
8
৫৬৮৩
The mean of the data set of 1000 items is 5. From each item 3 is subtracted and then each number is multiplied by 2. The new mean will be -
উত্তর
7
৫৬৮৪
The measurement of a rectangle is 16 feet by 12 feet. What is the area of the smallest circle that can cover this rectangle entirely (so that no part of the rectangle is outside the circle)?
উত্তর
100 π sq. ft
৫৬৮৫
The perimeter of rectangle is 200 meters. The breadth is 3/7 part of the length. What is the length?
উত্তর
70m
৫৬৮৬
In the figure, DE is parallel to BC. If the area of a triangle ADE is half that of trapezoid DECB, what is the ratio of AE to AC-
উত্তর
1 : √3
৫৬৮৭
The simple interest on a certain sum at the rate of 5% per annum for 3 years and 7 years differs by Tk. 400. What is the principal amount?
উত্তর
Tk. 2000
৫৬৮৮
At the rate of 15% simple interest per annum, how much profit will be earned on Tk. 900 as principal in 7 years?
উত্তর
Tk. 945
৫৬৮৯
What is the difference between simple and compound interest at 8% per annum on a sum of Tk. 12,500 at the end of 2 years?
উত্তর
Tk. 80
৫৬৯০
An accurate clock shows 3:00 PM. Through how many degrees will the hour hand rotate when the clock shows 9:00 PM?
উত্তর
180°