Question
‘A’ and ‘B’ can do a piece of work in 12 days
and 20 days, respectively. They started working together but ‘A’ left after 6 days. Find the time taken by ‘B’ to complete the remaining work.Solution
Let total amount of work be 60 units (LCM of 12 and 20). Efficiency of ‘A’ = 60/12 = 5 units/day Efficiency of ‘B’ = 60/20 = 3 units/day Amount of work done by ‘A’ and ‘B’ together in 6 days = (5 + 3) × 6 = 48 units Time taken by B to complete remaining work = {(60 – 48)/3} = 4 days
Find the median of 2, 8, 6, 6, 7, 9, 5, 12 and 13.
87.5% of the voters in State 'P' is equivalent to 10/11 of the voters in State 'Q', and 10/11 of the voters in State 'Q' is equal to 93.75% of the vot...
The mean of 12 numbers is 15. When two additional numbers, x and y , are included, the average increases by 1. Given that the difference between x and y...
- Determine the remainder when
The difference between the value of the number increased by 20% and the value of the number decreased by 30% is 120. Find the number.
How many numbers lie between 2000 and 3000 divisible by 5 can be made with the digits 2, 3, 4, 5, 6, 7 and 8 without repeating any digit?
If two numbers add up to 12 and the sum of their cubes is 1728, then what is the product of the two numbers?
If p and q are real numbers such that p2 + (p - 2q - 1)2 = - 4q(p + q), then the value p - 2q is
If the 4-digit number y29z is exactly divisible by 9, what is the least value of (y + z)?
Find the remainder when the number (256n + 105) is divided by 16.
Relevant for Exams:
