In a set of 10 consecutive positive integers, the sum of first 5 numbers is 510. What is the average of last 5 numbers in the series?
A machine can produce 10 units in 5 hours. Another machine can produce 5 units in 10 hours. Working together, how many units can they produce in 30 hours?
If b > d and a2c-d>a2e-d then which of the following must be true given that a,b,c,d & e are positive integers?
In a school, 40% of the students are male and all the students like either math or English. If 60% of the students like math and 30% of the students are male who like English, what percentage students of the class are female students who like English?
If a2b is negative, which of the following must be true?
A tank that was 10% full was emptied into a 50-litre bucket.If the oil now fills 40% of the bucket’s volume. Then what is half of the capacity of the tank in liters?
Sabuz earns 10 Taka for each ticket that he sells and a bonus of 2 Taka per ticket for each ticket he sells beyond the first 100 tickets. If Sabuz was paid 2,800 Taka last month, how many tickets did he sell?
Mamun has 5 fewer books than Zubayer. If Mamun gives Zubayer 5 books. Zubayer will then have four times as many books as Mamun. How many books does Mamun have?
Kalam has invested a part of 10,000 Taka in an account that pays 6% simple interest rate each year and rest of the money in another account that pays 8% simple interest per year. If he has invested the money for 18 months and he has invested the money for 18 months and he earns a total of 1,020 Taka as interest, what is the difference in the amount of the interest earned on both the accounts?
If the perimeter of a rectangular room is 32 feet and its area is 60 square feet, what is the length of each of its longer sides?
The surface tension of water at 52°c is -------