Question
‘P’ and ‘Q’ can complete a task together in 24
days. If ‘P’ alone can do it in 40 days, find the number of days ‘Q’ alone will take to finish the task.Solution
ATQ, Let the total work be LCM(24, 40) = 120 units. Combined efficiency of ‘P’ and ‘Q’ = 120 ÷ 24 = 5 units/day Efficiency of ‘P’ = 120 ÷ 40 = 3 units/day Efficiency of ‘Q’ = 5 - 3 = 2 units/day Time taken by ‘Q’ alone = 120 ÷ 2 = 60 days
- Determine the smallest 5-digit number that is divisible by 16, 28, 32 and 40.
A two-digit number is 5 times the sum of its digits. If 9 is added to the number, the digits get reversed. Find the number.
When the digits of a two-digit number are interchanged, the new number becomes 5 less than 150% of the original number. If the sum of the digits is 10, ...
4096Â Â Â Â Â Â Â Â 2048Â Â Â Â Â 514Â Â Â Â Â 64Â Â Â Â Â Â Â Â Â Â 4
...Two students appeared in an exam and one secured 30 marks more than the other. If marks of the student who got more marks is 65% of the sum of the marks...
The sum of two numbers is 30 whereas the sum of their reciprocals is (5/12). Find the square of the product of the two numbers.
One-fourth of a number is 70. What will 40% of that number?
- 7643529 is divisible by which of the following numbers?
I. 3
II. 11 Four numbers P, Q, R, S satisfy: Q is 25% less than P, Q:R = 9:10, and R:S = 5:8. If the average of P, Q, R, S is 94, find (S – P).
- 25% of 36% of 960 = m + 21.6, find the total of squares of each digit in ‘m’.
