How many multiples of 3 are there between 9 and 99 inclusive?
options:30 31 32 33 34 Ans 31
Here's where I am getting stuck:
3 x 3 =9
3 x 33 =99
Since the question asks for "including" there are 33-3+1=31 numbers.The solution ends here,but I went furthur and substracted 2 more (for 3x1 and 3x2.ofcourse because such an option was notthere I realised my mistake and "guessed the correct answer.)
Can somebody tell me when the last step is reqd.?Because I clearly remember doing such a problem where the last step was reqd.!