###Human: Thomas has 25 drawings to display. 14 of the drawings were made using colored pencils. 7 of the drawings were made using blending markers. The rest of the drawings were made with charcoal. How many are charcoal drawings?, ### Assistant: Thomas made 14 + 7 = 21 colored pencil and blending marker drawings.
Thomas made 25 total drawings – 21 colored pencil and blending marker drawings = 4 charcoal drawings. 
 So the answer is :  4