The phrase "21 S on a D" suggests that there are 21 sides on a die, which is not typical since standard dice have up to 20 sides. Assuming "19 AN of P" relates to the same context, it's unclear what "AN" or "P" refers to. The question seems to involve a riddle or code that needs further clarification to provide an accurate answer.
The answer is.... dots on a dice.
2 ? :D
21 dots on a die
To find the value of d. SO: if d + 21 = 25, subtract 21 from each side, gives d = 25 - 21, so d = 4
12%
21 spots on a dice
21 spots on a dice
21 dots on a standard die
21 dots on a dice
The answer is.... dots on a dice.
21 equals dots on a dice
21 Spots on a Die
9d-19=6d+2 ... add 19 to both sides and subtract 6d from both sides... 9d-6d=2+19 3d=21 d=21/3 d=7
6 Of course - assuming a cube die. There are other dice available (for playing D&D) which can have for example 4 (tetrahedral dice) or 20 (icosahedral dice) outcomes.
A standard cube die has 6. Other dice (as used by D&D players, etc) have 4 sides (tetrahedral dice), 8 sides (octahedral dice), 12 sides (dodecahedral dice) or 20 sides (icosahedral dice).
You spelled it correctly in your question.
D. G. Bridson died on 1980-10-19.