Maths Olympiad Prep

Track / Stage 4 / 59 of 340 #319 of 1964

Problem 319

AMC 12 late, AIME early
Number theory Difficulty 4.7 Find the answer

17. Determine the smallest positive integer nn such that nn is divisible by 20,n220, n^{2} is a perfect cube, and n3n^{3} is a perfect square.

A number or a short expression. Fractions can be typed as 3/2, and spacing doesn't matter.

Official solution

17. 1000000

Source: NuminaMath-1.5, licensed Apache-2.0. Statement and solution reproduced as published; topic, difficulty and ordering added by this site.