AMC 10 Step by Step
Log inSign up
2010 AMC 10AProblem 24P21-25~12 minPrint
Modular ArithmeticDivisibility & FactorsUse the answer choices (mod checks, size, form) to eliminate or selectSet up the equation/formula and compute; no special trick needed

The number obtained from the last two nonzero digits of 90!90! is equal to nn . What is nn ?

Log in to save your progress.

Similar problems

Problem © Mathematical Association of America (MAA), American Mathematics Competitions. Reproduced for non-commercial educational use. Solution and commentary are original to this site.