২৩৬৮১
A clock strikes once at 1 o'clock, twice at 2 o'clock, thrice at 3 o'clock and so on. How many times will it strike in 24 hours?
উত্তর
156
২৩৬৮২
The perimeter of a rectangle is 26 cm. The rectangle is converted to a square by tripling the width and taking a quarter of the length. what is the perimeter of the resulting square?
উত্তর
12 cm
২৩৬৮৪
In an examination , 34% of the studens failed in mathematics and 42% failed in English. If 20% of the students failed in both the subjects , then find the percentage of students who passed in both the subjects.
উত্তর
44%
২৩৬৮৫
125 gallons of a mixture contains 20% water. what amount of additional water should be added such that water content is raised to 25%?
উত্তর
253 gallons
২৩৬৮৮
A box is made in the form of a cube. If a second cubical ox has inside dimensions three times those of the first box, how many times as much does the second box contain?
উত্তর
27
২৩৬৮৯
A Can do a job in 24 days, B in 9 days and C in 12 days. B and C together start the work but leave after 3 days. How much time was taken by A to complete the remaining work?
উত্তর
10 days