The sum of the digits of a two digit number is 15. When 9 is subtracted from the given number then its digits interchanged. What will be the required original number?

There are 80 students in a class out of these 15% are girls. The monthly fee of each girl is Rs.350 and monthly fee of each boy is 38% more than each girl. What is the total fee of girls and boys in the class?

In an examination, 50% of the students passed in Science and 75% passed in Social Science, while 20% students failed in both the subjects. If 270 students passed in both subjects, find the total number of students who appeared in the exam?

The monthly income of Shagun and Komal together is Rs.28000. The income of Shagun and Komal is increased by 25% and 12.5% respectively. The new income of Komal becomes 120% of the new salary of Shagun. What is the new income of Shagun?

In a school there are 2000 students. On January 2nd, all the students were present in the school except 4% of the boys and on January 3rd, all the students are present in the school except 28/3% of the girls, but on both the days' number of students present in the school, were same. The number of girls in the school is –

In an election only two candidates A and B contested 30% of the voters did not vote and 1600 votes were declared as invalid. The winner, A got 4800 votes more than his opponent thus he secured 51% votes of the total voters on the voter list. Percentage votes of the loser candidate, B out of the total voters on the voter list is:

35 percent of a number is 1249.5. What is 78 percent of that number?

A alone can complete a piece of work in 6 days and B alone can complete the same work in 8 days, then in how many days can A and B together complete the same work?