Question
For the integers from 1 to 1000, how many multiples of 9 are also multiples of 6?
Answers
Reiny
6 = 2x3
9 = 3x3
so the LCM of 6 and 9 is 18
so how many multiple so 18 are there from 1 to 1000 ?
...18 ....36 ... etc ... 990
term 1 = 18
term 2 = 36
...
term ? = 990
can you determine which term ? is equal to 990 ?
9 = 3x3
so the LCM of 6 and 9 is 18
so how many multiple so 18 are there from 1 to 1000 ?
...18 ....36 ... etc ... 990
term 1 = 18
term 2 = 36
...
term ? = 990
can you determine which term ? is equal to 990 ?
andrew
I think term 55 but I am not sure what that proves or if it shows you the answer?