Puzzle 22 Solution

Multiply the digits of the previous term to give the next term.
eg: 2 x 3 x 4 x 9 x 8 x 7 x 7 = 84672, which is the 2nd term.

Hence, the next term after 54 is 5 x 4 = 20 and the term after that is 2 x 0 = 0. Subsequent terms will then all be 0.

Answer: 0