the number 6 drawn in the doodle style.outline drawing by hand.black and white image.monochrome.mathematics and arithmetic.

abstract alphabet arithmeticvector art background black brush calligraphy collection cute design doodle drawing drawn element five font graphics hand handblack illustration imagemonochromemathematics isolated letter lettering line math nature number number1 numbers one ornament pattern pen plant retro scroll set shape sign sketch style styleoutline symbol text texture type typography vector vortex white zero