Blackstone's Card Trick Without Cards number is ten times the card's value, plus a fixed 15 (for the addition of 3 and the multiplication by 5) and an additional suit-dependent figure. Thus both suit and value are readily identifiable. To find their card, you take their number and subtract 1 to get the number on the card. The suit is based on the second number. 4 for Spades, 3 for Hearts, 2 for Clubs, and 1 for Diamonds. For example, if their number is 64, then their card would be the 5 of Spades. Blackstone's Card Trick Without Cards Blackstone's Card Trick Without Cards is
How many angels can dance on the head of a pin? about how many could perch at the same time on the head of a pin"". Dorothy L. Sayers argued that the question was "simply a debating exercise" and that the answer "usually adjudged correct" was stated as, "Angels are pure intelligences, not material, but limited, so that they have location in space, but not extension." Sayers compares the question to that of how many people's thoughts can be concentrated upon a particular pin at the same time. She concludes that infinitely many angels can be located on the head of a pin, since they do not occupy any space there: