Mathematics questions
18011 published questions with worked solutions.
- The number of signals that can be sent using 5 flags of different colours, taking one or more at a time, is
- The sum of the digits in the unit place of all numbers formed with the help of 3,4,5,6 taken al, at a time, is
- The rank of the word MOTHER when the letters of the word are arranged alphabetically as in a dictionary, is
- If r,s,t are prime numbers and p,q are the positive integers such that LCM of p,q is r^2s^4t^2, then the number of ordered pairs...
- The number of words that can be formed out of the letters of the words 'ARTICLE' so that the vowels occupy even places, is
- If the letters of the word 'SACHIN' are arranged in all possible ways and these words are written out as in dictionary, then the...
- Assuming that no two consecutive digits are same. The number of n digit numbers is
- The number of ways of arranging letters of the word HAVANA so that V and N do not appear together is
- If P_m stands for ^mP_m, then 1+1P_1+2P_2+3P_3+ +n P_n is equal to
- How many numbers of 6 digits can be formed from the digits of the number 112233?
- If ^ 12 P_r=1320, then r is equal to
- There are 10 true-false questions in an examination. Then, these questions can be answered in
- If there are n number of seats and m number of people have to be seated, then how many ways are possible to do this (m<n)?
- The number of permutations by taking all letters and keeping the vowels of the word COMBINE in the odd places is
- The number of seven digit integers, with sum of the digits equal to 10 and formed by using the digits 1,2 and 3 only, is
- How many ways are there to arrange the letters in the word 'GARDEN' with the vowels in alphabetical order?
- The number of natural numbers less than 1000, in which no two digits are replaced, is
- All the words that can be formed using alphabets A,H,L,U,R are written as in a dictionary (no alphabet is replaced). Then, the...
- 9 balls are to be placed in 9 boxes and 5 of the balls cannot fit into 3 small boxes. The number of ways of arranging one ball in...
- Eight chair are numbered 1 to 8. Two women and three men wish to occupy one chair each. First the women choose the chairs from...