A and B are two multiples of 36, and Q is the set of consecutive integers between A and B, inclusive. If Q contains 9 multiples of 9, how many multiples of 4 are there in Q?  Choose the correct answer
A) 18
B) 19
C) 20
D) 21
E) 22
Now given that Q is set the consecutive integers between A and B.   and Q contains 9 multiples of 9   Let take A as 36.   then 36 45 54 63 72 81 90 99 108...So B will 108.   Now let's check the multiples of 4 among this set   108 - 36 / 4 + 1 =&gt; 18 + 1= 
<gadget id="calculator">18 + 1</gadget>
<output>19</output>
&gt; 19   ANS option 19.
<result>B</result>
A and B are two multiples of 36, and Q is the set of consecutive integers between A and B, inclusive. If Q contains 9 multiples of 9, how many multiples of 4 are there in Q?