Question
Ramesh and Rahman can do a work in 20 and 25 days
respectively. After doing collectively 10 days of work, they leave the work due to illness and Suresh completes rest of the work in 3 days. How many days Suresh alone can take to complete the whole work ?Solution
Ramesh               Rahmaan 20                         25               100 5                           4 Total work =100 Work done by Ramesh and Rahman in 10 days = (5 + 4) x 10 = 90 Remaining work = 100-90 = 10 Let the efficiency of Suresh be x, then = 3x = 10 = x = 10/3 Suresh complete the whole work in = 100/(10/3) = 10 x 3 = 30 days
Find the number of even numbers between 12 and 30.
What is the unit digit of 49 15?
If ‘+’ means ‘-‘, ‘×’ means ‘÷’ ‘÷’ means ‘+’ and ‘-‘ means ‘×’, then which of the following will be the value of th...
- The divisor is 60% of the quotient and 6 times the remainder. If the remainder is 1, then what is the dividend?
Which of the following is a Prime Number?
According to a plan, a team of farmers decided to harvest 208 cubic meters of rice in several days. In the first four days, the team fulfilled the daily...
- Find the minimum number to subtract from 981243 so that the new number is exactly divisible by 9.
What is the average of first 39 multiples of 3.9?
What should come in place of the question mark (?) in the following question?
956 × 753 = ?
What should come in place of question mark (?) in the following questions? Find the exact value.
