The average of five numbers is 25. After one if the numbers is removed, the average of the remaining is 31. What number has been removed?
An ambulance travels 10 miles at a speed of 75 mi,es per hour. How fast must the ambulance travel on the return trip if the round-trip travel time is to be 20 minutes?
An amount of money was distributed among some people in such a way that it there had been 4 more people, everyone would have got Tk. 16 less. But if there had been 4 less people everyone would have got Tk. 24 more. How many people were there in the group?
In a college, 45% of the students are boys. If 40% of the boys and 20% of the girls went on a picnic, what percentage of the total students went to the picnic?
In a survey, it was found that 65% of the people surveyed watched the news on television, 40% read it on newspaper, and 25% read a newspaper and watched the news on television. What percent of the people surveyed neither watched the news on television nor read a newspaper?
In a certain country, a person is born every 7 seconds and a person dies in every 13 seconds. Therefore, the birth and death rates account for a population growth rate of one person every----
If (a+a+a)=(b+b+b+b)and (a+b)=7, then what is the value of (a2-b2)?
Baki lives 2 miles west of Raju's house. Rafiq lives 3 miles north of Raju's house and 2 miles west Diba's house. What is the straight-line distance from Baki's house to Diba's house?
On Tuesday, 30 of the students in a class took a test and their average score was 83.5. On Thursday, the other 5 students took the test, and their average score was 94. What was the average for the entire class?
If the average of 7, 13, p and q is 17, what is the average of (p+11) and (q-9)?
A circular logo is enlarged to fit the lid of a jar. The new diameter is 50 percent larger than the original. By what percentage has the area of the logo increased?
Reza's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 is to 2 and the ratio of Indian to British stamps is 5 is to 1, what is the ratio of US to British stamps
After being dropped, a certain ball always bounces back to 2/5 of the height of its previous bounce. After the first bounce it reaches a height of 125 inches. How high (in inches) will it reach after its fourth bounce?
At a particular moment, if the angle between the hour hand and the minute hand of a clock is 105 , what was the time by the clock at that time?
If x = 2y = 3z and xyz =36, what is the value of z ?
Among the executives who reaches office first?
Who ranks fourth in the sequence of reaching office?
P,Q,R and S are four men , p is the oldest but not the poorest. R is the richest but not the oldest. Q is older than S but not than P or R, P is richer than Q but not than S .The four men can be ordered descending in respectof age and richness respectively, as
If x=2y =3z and xyz=36, what is the value of z?
A ferry, when empty, travels twice as fast as when it is full. It travels 20 miles south with a cargo, spends 30 minutes for unloading, and returns to its original port empty in a total of 8 hours, what is the speed of the ferry when it is empty?
A bicycle has two wheels (one large and one small) of 120 cm and 40 cm in diameters. When the large wheel makes 10 revolutions, how many revolutions does the small wheel make in that time?