Problem
NT-B2-M05-P004 Zeros in \(80!\)
#4
★★☆☆☆ Level 2 of 5
How many trailing zeros does \(80!\) have in decimal notation?
Count fives.
The number of zeros is \(v_5(80!)=\lfloor80/5\rfloor+\lfloor80/25\rfloor=16+3=19\).
Standard trailing-zero problem.