Boy, glasses, slide rules, portrait, curled, schoolboy, young person, 13 years, grinds, abaci, concentration, concentrate, count, work out, add, addition, subtraction, subtract, think below, plus, sum, consider, teasers, school, learn, continuing education, circular frame, studio
Size: 3629px × 5443px
Photo credit: © Hans-Peter Merten / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 13, abaci, add, addition, boy, circular, concentrate, concentration, continuing, count, curled, education, frame, glasses, grinds, learn, person, portrait, rules, school, schoolboy, slide, studio, subtract, subtraction, sum, teasers, work, years, young