An \u2018in shuffle\u2019 is a perfect shuffle on a standard deck of 52 playing cards that splits the deck in half, then interleaves cards starting with the top half.\n\n* What is the position of the first card after the 7th shuffle?\n\n* How many times must one perform the shuffle so that the top card becomes the bottom card?\n\n* When do the first and last cards in the deck touch?\n\nCan someone explain their code?

An \u2018in shuffle\u2019 is a perfect shuffle on a standard deck of 52 playing cards that splits the deck in half, then interleaves cards starting with the top