Aptitude Hack#99 (2-6-19)

 Question:

If 1/3rd of a number subtracted from. Of that number, then the difference is 10more Than 1/7th of the same number. How much is that number?

   A )   420
   B )   400
   C )   405
   D )   415

Answer: A) 420

Explaination : 

Let the number = x

=> x/2 – x/3 = x/7+ 10

=> 3x-2x/6 = x/7+10

=> x/6 – x/7 = 10

=>7x-6x/42 = 10 
=> x = 420