Showing what's behind the curtain

In the game, Monopoly, find the three most popular squares when using two 4-sided dice.

Using a brute force attack, can you decrypt the cipher using XOR encryption?

Determining the kth element of the sorted radical function.

How many letters would be needed to write all the numbers in words from 1 to 1000?

Find the minimal path sum from the left column to the right column.

How many triangle words does the list of common English words contain?

Squarefree Binomial Coefficients

Find the minimal path sum from the top left to the bottom right by moving left, right, up, and down.

Investigate values of n for which φ(n) is a permutation of n.

How many values of C(n,r), for 1 ≤ n ≤ 100, exceed one-million?