Hey there!
To solve this problem, first divide the numbers 240 and 6 . . .
240 divided by 6 = 40
Since Selma had 6 times as many coins as she did 4 months ago, the number of coins 4 months ago times the number 6 should equal 240.
40 x 6 = 240
The number 40 is correct.
Selma had 40 coins 4 months ago.
Hope this helps you.
Have a great day!