After taking 30 socks out of the washing machine, Shamim noticed that the ratio of blue socks to brown socks to black socks was 2:3:5. How many black socks were in the washing machine?
ক ও খ একত্রে একটি কাজ ১০ দিনে শেষ করতে পারে। খ একা কাজটি ১৪ দিনে শেষ করতে পারলে ক একা কত দিনে কাজটি শেষ করতে পারবে?
A man can row downstream at 10 kmph and upstream at 5 kmph. The man's rowing rate in still water is ----
If the circumference of a circle is increased by 50%, its area will be increased by :
The diameter of a wheel is 63 cm. Distance traveled by the wheel in 100 revolutions is ----
0.777777/0.011=?
The arithmetic mean of the set of observations 1, 2, 3, --------n is -----
A number consists of two digits, whose sum is 10. If 18 is subtracted from the number, digits are reversed. The number is ----
If k is an integer, what is the smaller; possible value of k such that 1040k is the square of an integer?
5p - 3g = 42; 5p + 3q = 18 Given this system of equations, what is the value of Ipl + IqI?
If 2x - y = 10 and x/y = 3, then x= ?
If 4x - 3y = 13 and 5x + 2y = -1, then x = ?
If 2x - 3y = 6, then 6y - 4x = ?
-12
-6
6
১২
Luke drives the first 300 miles of a trip at 60 miles an hour. How fast does he have to drive, in miles per hour, on the final 200 miles of the trip if the total time of the trip is to equal 7 hours? .
If Michael can shovel all the snow of a standard driveway in 12 minutes, and Emon can shovel all the snow of a standard driveway in 36 minutes, then working together, how many minutes would it take for them both to shovel all the snow of a standard driveway?
If x+2y=2x+y, then x-y equal to ---
To the nearest degree, what is the measure of the second smallest angle in a right triangle with sides 5, 12, and 13?
If the area of a square increases by 69%, then the side of the square increases by ---
Of the following list of numbers, which has the greatest standard deviation?
If x/y=4 and y is not 0, what percentage (to the nearest percent) of x is 2x-y?