How many such pairs of letters are there in the word MEDIOCRE each of which has as many letters between them in the English alphabet series? 

In a class of thirty-eight students, Z is 13th from the left end and X is 2th to the right of Z and P is 1th to the left of X then how many students are to the right of X and what is the position of P from the right end? 

The position of how many digits in the number 6147982 will remain same after the digits within the number are arranged in descending order? 

Ram was twelve times as old as his son twenty years ago. Now he is twice as old as his son. What are the present ages of the son and Ram?

The income of A and B are in the ratio of 4:7. A and B saves Rs. 4000 and 5000 respectively. If the expenditure of A is equal to 60% of the expenditure of B. Then, find the difference between their incomes.

Two-person X and Y invested their money in the ratio of 30:28 and the ratio of their respective profits at the end of a year is 10:4. If Y invested the money for 3 months, then for how much time (in months) x invested his money?

A certain number of men can complete a work in 17 days working 8 hour a day. If the number of people is decreased to 60%. Then, find in how many hrs in a day should the remaining people work to complete the work in 51/2 days?

Travelling at 80km/hr, Praveen reaches his destination at a certain time. He covers 3/5th of his journey in 2/5th at the time. At what speed (in km/hr) should he travel to cover the remaining journey, so as to reach his destination on time?