Tally marks for a number are: ||||̸ ||||̸ ||||̸ |||. What number do they represent?

A pictograph uses small pictures to represent counts. A key (or scale) tells you what one picture stands for — e.g. 1 ⚽ = 5 students. To find a category's count, multiply the number of pictures by the scale. A half-picture means half the scale (so 2½ ⚽ = 12.5, but in practice we round to a whole). Pictographs are friendly but imprecise — they're best for rough comparisons.