Understanding the 21 Card Trick

What is the first step in performing the card trick?

• Revealing the card

• Selecting a card

• Dealing the cards into piles

• Shuffling the cards

How many piles are the cards dealt into after shuffling?

• Five piles

• Four piles

• Three piles

• Two piles

What mathematical concept is used to explain the 21 card trick?

• Algebra

• Probability

• Modular arithmetic

• Geometry

In which positions does the card lie after the first arrangement?

• 8 to 14

• 1 to 7

• 15 to 21

• 22 to 28

What is the final position of the card after the trick is completed?

• Position 7

• Position 9

• Position 11

• Position 13

What is the main purpose of dividing the cards into columns?

• To ensure the card is at the bottom

• To confuse the audience

• To make the trick look more complex

• To locate the card using modular arithmetic

How does the performer ensure the card is not removed during the final selection?

• By using a duplicate card

• By secretly marking the card

• By controlling the audience's choices

• By using a mathematical strategy

What was the initial reaction of the performer upon learning the trick?

• Immediate recognition of its mathematical nature

• Disinterest in the trick

• Confusion about the steps

• Surprise at its simplicity

What is the performer's daughter's main interest in the trick?

• Understanding the mathematics

• Performing on television

• Getting a reaction from the audience

• Memorizing the routine

What is the significance of the number 21 in the card trick?

• It is the number of cards used

• It is the number of shuffles required

• It is the number of steps in the trick

• It is the number of possible outcomes