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MATH / Find the units digit of the sum of the first 21 positive perfect cubes.

Problem

Answer published by the source. Consult the official source to check your work against its answer.

problem

Find the units digit of the sum of the first 2121 positive perfect cubes.
Plain-text mathematical notation (without MathML)
Find the units digit of the sum of the first 21 positive perfect cubes.
Original LaTeX notation
Find the units digit of the sum of the first $21$ positive perfect cubes.

level

Level 4

type

Number Theory

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Source and history

Official source

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