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n ( > 4 ) kids are standing in a line one next to the other, such that everybody is facing north. How many kids are there? Statement 1: Number of ways in which 3 kids can be selected such that no two selected kids are standing next to each other is 10. Statement 2: If the kids are made to sit around a circular table such that one particular kid always occupies a specific seat, the number of such arrangements possible is 120.

how many number of solutions to the equations a+b+c+d = 11 where 1<= a,b,c,d <=5?

Find the sum of all the no.'s less than 10000 that can be formed using digits 1,2,3,4 without repetation ? In this question solution is provided as 3 digit number sum = 2!*(6+7+8+9)*111=6660...but in the question it is given that we have to use only 1,2,3,4 digits...please elaborate the explaination

X is the smallest positive integer greater than 100 such that, if its leftmost digit is deleted, the resulting integer is X19. How is it divisible by 2 prime numbers?

1) It gets dark at around 5 p.m. 2) It gets dark around 5 p.m.

which one is correct ? Are both correct ? Am particularity confused about the usage of "around" and "about" in sentences where both seem logical.

if 5^|3x+4| = 25^4x , find x ? this is logarithms powerplay ques. I don't understand why is negative 4/11 wrong answer and only positive 4/5 is correct ?

Interesting question on Circle : Pls help

For a positive integer n, let $$P_n$$ denote the product of the digits of n, and $$S_n$$ denote the sum of the digits of n. The number of integers between 10 and 1000 for which $$P_n$$ + $$S_n$$ = n is

How do I go about solving questions based on routes and networks?

how do i solve RC?