The number four, 4, on a glass wall.
Size: 4378px × 5559px
Photo credit: © Trygve Finkelsen / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: 4, abstract, alphabet, background, black, blue, business, collection, color, concept, count, decoration, design, digit, education, element, font, graphic, hand, human, icon, illustration, isolated, math, mathematics, number, numeral, object, people, reflection, school, set, sign, symbol, text, wall, white