Question 123
Suppose there are 5 cards, each one of which has a distinct number from the set $\{2, 3, 4, 5, 6\}$ written on it. When these cards are placed in line from left to right randomly, what is the probability that for each $i$, $1 \leq i \leq 5$ the number written on the card placed on the $i$-th spot from the left is greater than or equal to $i$?