Question 21266
THE GIVEN CONDITION MEANS ,THE NUMBER OF HIPPOS LESS ONE IS DIVISIBLE BY 2,3,4,5,AND 6.SMALLEST UH NUMBER WOULD BE THE LCM OF THESE NUMBERS
2..|2,3,4,5,6
-----------------
..3|1,3,2,5,3
------------------
....1,1,2,5,1
HENCE LCM = 2*3*1*1*2*5*1=60
SO NUMBER OF GOATS = 60+1=61....NOTE THAT IT COULD BE 
 ANY MULTIPLE OF LCM=60 PLUS 1...THAT IS 121,181,ETC...