self Maths Puzzle

If we subract a number with y, we get 4 increase of number, once it got divided by y itself.. Find that number??

wht will be d equation???

Read Solution (Total 2)

Let number be x

then x - y = x/y + 4

=> xy - y^2 = x + 4

now we need options to solve , one pair can be x = 12 and y = 6
13 years agoHelpfull: Yes(5) No(3)

x-y = x/y +4

x=12, y=2
13 years agoHelpfull: Yes(3) No(1)

self Other Question

A boy wants to make cuboids of dimension 5m, 6m and 7m from small cubes of .03 m3. Later he realized he can make same cuboids by making it hollow. Then it takes some cubes less. What is the number of the cubes to be removed? The bacteria have the probability of split into 3 and probability to die is 1/3rd of the total bacteria. Let the probability is P. Some of them survived with probability 1/5.Then which among the following relation is true?
a)P=1/3+1/5*3 b)P=1/5*(1/8-3)