noel arranging his pictures in rows in his albums. if he puts 7 in a row thre are 4 extra pictures. if he puts 9 in a row there is none left. what is the smallest number of pictures that will allow him to do this?

Question

anonymous · Answer

suppose there are x rows and y pictures.

7x +4 = y

9x = y
solve for x and y. y is what you are looking for.

sriram · Answer

7r+4 is divisible by 9
r=2

sriram · Answer

@ dhatraditya the no of rows in both cases need not be the same

anonymous · Answer

then there is not enough information do solve this problem.