Math Problem Statement
có bao nhiêu số từ 1000 đến 6000 mà tổng các chữ số của chúng chia hết cho 3 đi
Solution
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Math Problem Analysis
Mathematical Concepts
Number Theory
Divisibility Rules
Modulo Arithmetic
Formulas
Sum of digits formula: S = a + b + c + d
Divisibility rule: S mod 3 = 0
Theorems
Divisibility by 3 Theorem
Suitable Grade Level
Grades 8-10
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