Question 289852
multiples of 3 and 7
3*7=21
21
42
63
84
there are 4
multiples of
7

7,14,21,28,35,42,49,56,63,70,77,84,91,98
14 multiples
10-99
3,6,9 less than 10
99/3=33
30 multiples of 3 between 10 and 99
14 multiples of 7
98/7=14
14-1=13
30+13-4=39
answer D)