Question
A certain number of persons can complete a piece of work
in 46 days. If there were 8 persons more, the work could be finished in 16 days less. How many persons were originally there?Solution
Let there be x men originally x men finish the work = 46 days And (x + 8) persons finish the work = (46-16) = 30 days  x men finish the work = 46  1 man finish the work = 46x  (x + 8) persons finish the work = 30 1 man finish the work = 30(x + 8) Now, 46x = 30(x + 8)  46x = 30x + 240 16x = 240 x = 15 There were 15 persons.
If '63a9b' is a five-digit number which is divisible by 72, then find the value of (a + 2b).
What is the greatest number that will divide 917 and 1337, leaving remainder 7 in each case?
The digits of a two-digit number ‘N’ are reversed to form a new number ‘M’. If M < N and N – M = 45, then which of the following maybe ‘N’...
Find the median of 2, 4, 6, 6, 7, 9, 14, 12 and 13.
Three fruit sellers P, Q and R have different quantities of fruits to sell. P and Q together have fifteen more than half of quantity what P and R togeth...
Nine numbers are arranged in decreasing order. The average of the first eight numbers is 50, and the average of the last eight numbers is 45. What is th...
Find the fourth proportional of 12, 24, and 30.
Find the number which is nearest to 457 and is exactly divisible by 11.
- For which values of x is the expression 25x - 5x² - 100 positive?
A two-digit number has a sum of its digits equal to 9. Additionally, if 27 is subtracted from this number, the resulting number has its digits reversed....
