Mathematics questions
18011 published questions with worked solutions.
- A class has three teachers, Mr. P, Ms. Q and Mrs. R and six students A, B, C, D, E, F. Number of ways in which they can be seated...
- Let P_n denotes the number of ways in which three people can be selected out of 'n' people sitting in a row, if no two of them...
- There are 20 books on Albegra and Calculus in one library. For the greatest number of selections each of which consists of 5...
- Number of ways in which 5 A's and 6 B's can be arranged in a row which reads the same backwards and forwards, is N then value of...
- Consider the five points comprising of the vertices of a square and the intersection point of its diagonals. How many triangles...
- Number of permutations of 1,2,3,4,5,6,7,8 and 9 taken all at a time are such that the digit 1 appearing somewhere to the left of...
- Number of 4 digit numbers of the form N=abcd which satisfy following three conditions 1. 4000 N<6000 2. N is a multiple of 5 3. 3...
- Let f(n)= _ r=0 ^n _ k=r ^n kr. Find the total number of divisors of f(9).
- If ^ n-1 C_3+ ^ n-1 C_4> ^nP_3, then
- If ^ n-1 C_6+ ^ n-1 C_7> ^nC_6, then
- 12 persons are to be arranged to a round table. If two particular persons among them are not to be side by side, the total number...
- If 7 points out of 12 are in the same straight line, then the number of triangles formed is
- Four couples (husband and wife) decide to form a committee of four members. The number of different committees that can be formed...
- The number of ways four boys can be seated around a round table in four chairs of different colours is
- How many numbers between 5000 and 10,000 can be formed using the digits 1,2,3,4,5,6,7,8,9, each digit appearing not more than...
- The number of ways in which n ties can be selected from a rack displaying 3n different ties is
- A father with 8 children takes 3 at a time to the Zoological Gardens, as often as he can without taking the same 3 children...
- The total number of ways of dividing mn things into n equal groups, is
- Ramesh has 6 friends. In how many ways can he invite one or more of them at a dinner?
- The number of all possible selections of one or more questions from 10 given questions, each question having an alternative is