Ask Your Questions

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?

There are two qualities of milk - Amul and Sudha having different prices per litre, their volumes being 130 litres and 180 litres respectively. After equal amounts of milk was removed from both, the milk removed from Amul was added to Sudha and viseversa. The resulting two types of milk now have the same price. Find the amount of milk drawn out from each type of milk.?