The students in a class can be divided into groups of 2, 3, 5 and 6. What is the least number of children this class can have.

The number of ways can five people be divided into three groups is

The number of ways in which 9 persons can be divided into three equal groups is

In a class of 40 students, 45% are girls. Find the number of boys in the class .

The Math teacher has to give 5 worksheets to each student in her class. She finds that she has 2 worksheets less than what she needs. If the number of students in the class is f, how many worksheets did the teacher have with her?

There are 45 students in a class and 3/5 of them are boys. How many girls are there in the class?

On the occasion if Deepawali festival, each student in a class sends greeting cards to other. If there are 20 students in the class, find the total number of greeting cards exchanged by the students?

The number of ways in which 12 students can be equally divided into three groups is

In Class XI of a certain school, there are 30 students in a Mathematics class and 20 students in Biolog class. Find the number of students which are in Mathematics class or in Biology class in the following cases: (i) Two classes are conducted at the same time. (ii) Two classes are condcuted at different time and 5 students study both the subject

During the Inter - School Debate championship, students of the 9^(th) grade of lIIions Public School had to be divided into group.It was found that if they were divided into group of four, one students was left out. If they were divided into group of six, then too, one students was left out. What was the minimum number of students in the grade such that they can be perfectly divided in group of five ?

For a set of five true- or -false questions no students has written the all - correct answer ,and no two students have given the same sequence of answer. What is the maximum number of students in the class , for this to be possible?