Answer:
4
Explanation:
Multiples of 7 and 3 are 21, 42, 63, 84
Hope this helps.
21, 42, 63, 84
Cards with both star and circle are multiples of both 3 and 7, ie 3*7= 21
21, 21*2= 42, 21*3= 63, 21*4= 84
So 21, 42, 63 and 84 are the required numbers
3.6m questions
4.7m answers