Mathematics questions
18011 published questions with worked solutions.
- How many different non-digit numbers can be formed from the digits of the number 223355888 by rearrangement of the digits so that...
- Ten persons, amongst whom are A,B and C to speak at a function. The number of ways in which it can be done, if A wants to speak...
- The number of ways in which 20 one rupee coins can be distributed among 5 people such that each person, gets at least 3 rupees, is
- The number of 5 digits telephone number having at least one of its digits repeated, is
- Statement 1: Product of five consecutive natural numbers is divisible by 4!. Statement 2: Product of n consecutive natural...
- A man has 7 friends. In how many ways he can invite one or more of them for a tea party?
- How many numbers divisible by 5 and lying between 3000 and 4000 that can be formed from the digits 1,2,3,4,5,6 (repetition of...
- If ^8C_r- ^7C_3= ^7C_2, then r is equal to
- How many words can be made from the letters of the word DELHI, if L comes in the middle of every word?
- If a,b,c N, the number of points having position vector a i+b j+c k such that 6 a+b+c 10, is
- m men and n women are to be seated in a row so that no two women sit together. If m>n, then the number of ways in which they can...
- In how many ways can Rs 16 be divided into 4 persons when none of them get less than Rs 3?
- Consider the following statements: 1. The product of r consecutive natural numbers is always divisible by r. 2. The total number...
- There are four balls of different colours and four boxes of colours same as those of the balls. The number of ways in which the...
- There are 3 candidates for a post and one is to be selected by the votes of 7 men. The number of ways in which votes can be...
- Eleven books consisting of 5 Mathematics, 4 physics and 2 Chemistry are places on a shelf. The number of possible ways of...
- The total number of permutations of n(>1) different things taken not more than r at a time, when each thing may be repeated any...
- A total number of words which can be formed out the letters a,b,c,d,e,f taken 3 together such that each word contains at least...
- Statement 1: The number of non-negative integral solutions of x_1+x_2+x_3+ +x_n=r is ^ r+n-1 C_r. Statement 2: The number of ways...
- If eleven member of a committee sit at a round table so that the President and Secretary always sit together, then the number of...