In how many ways 6 couple can sit around a table such that only one couple sits together.
How do I select 4 people out of 9 sitting in a row, such that no two persons are sitting together?
Could some-body post a detailed solution on how to approach these type of PnC problems?
In how many ways can 7 distinct balls be distributed in 5 different boxes such that no box remains empty.
A and B run a 500 m race ending in a dead heat. At first, A runs 20% faster than B. After 'X' m, B quickens his pace and for the remaining race, he runs 25% faster than A. How many metres will A run before B quickens his pace?
guys can someone explain how the installment formula in case of SI is derived?? why are we taking time from 0 to t-1 and why not 1 to t? very confusing..
Raju is playing a game where he keeps drawing one card from a pack of cards until he gets 2 aces.What is the probability that the game ends with the 4th draw?
A can complete a piece of work in 12 days, B in 15 days and C in 20 days. All of them together started the work but C left when he realised that the remaining work will be completed without him in the next two days, and B left when he realised that the remaining work will be completed without him in the next one day. Find the total number of days taken to complete the work.
2 complex numbers z1 and z2 such that mod(z1) =12
and mod(z2-3-4i) =5
Find minimum value of mod(z1-z2)
The integers 1, 2, ..., 40 are written on a blackboard. The following operation is then repeated 39 times:
In each repetition, any two numbers, say a and b, currently on the blackboard are erased and a new
number a + b - 1 is written. What will be the number left on the board at the end?
(1) 820 (2) 821 (3) 781 (4) 819 (5) 780
can anyone explain the steps for finding the number of common roots between 2 quadratic equations and also what is a repeated root??
There is a ten-digit number whose leftmost digit is equal to the number of 1’s in the number, second leftmost digit is equal to the number of 2’s in the number, third left most digit is equal to the number of 3’s and so on. The rightmost digit of the number is equal to the number of 0’s in the number. What is the sum of the digits of the number? Please explain your approach
- 8
- 9
- 10
- None of These
0 voters
There is a ten-digit number whose leftmost digit is equal to the number of 1’s in the number, second leftmost digit is equal to the number of 2’s in the number, third left most digit is equal to the number of 3’s and so on. The rightmost digit of the number is equal to the number of 0’s in the number. What is the sum of the digits of the number? Please explain your approach
- 8
- 9
- 10
- None of These
0 voters
There is a ten-digit number whose leftmost digit is equal to the number of 1’s in the number, second leftmost digit is equal to the number of 2’s in the number, third left most digit is equal to the number of 3’s and so on. The rightmost digit of the number is equal to the number of 0’s in the number. What is the sum of the digits of the number? Please explain your approach
- 10
- None of These
- 9
- 8
0 voters
There is a ten-digit number whose leftmost digit is equal to the number of 1's in the number, second leftmost digit is equal to the number of 2's in the number, third left most digit is equal to the number of 3's and so on. The rightmost digit of the number is equal to the number of 0's in the number. What is the sum of the digits of the number? Please explain your approach
how many pairs exist such that lcm is 1260 and hcf is a prime no? i know this question is repeated still please do help me @iimcat2015 @pratiksahoo33 @scrabbler @Huey @Going_High
In how many ways 1500 can be expressed as a products of 3 integers?
suppose A is the first element of the set of "n" consecutive natural numbers, (n>1),starting from A, such that sum of all elements is 50. what is sum of all possible values of A?
A boy starts to paint a fence on one day. On the second day, two more boys join him. On the third day, three more boys join the group, on the fourth day four more boys join the group and so on. If the fence is completely painted this way in exactly 20 days, then find the number of days in which 10 men painting together can paint the fence completely, given that every man can paint twice as fast as a boy can.
a)20 days b)154 days c)45 days d)77 days
I don't understand the