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Exemplo 1.6 de Elementary Algebra, 1.1 Introduction to Whole Numbers
Problema e solução em inglês, como no livro original.
Is 5,625 divisible by 2? By 3? By 5? By 6? By 10?
Resolva no papel primeiro. Depois abra a solução um passo de cada vez e pare assim que conseguir terminar sozinho.
| Is 5,625 divisible by 2? | |
| Does it end in 0,2,4,6, or 8? | No. 5,625 is not divisible by 2. |
| Is 5,625 divisible by 3? | |
| What is the sum of the digits? | |
| Is the sum divisible by 3? | Yes. 5,625 is divisble by 3. |
| Is 5,625 divisible by 5 or 10? | |
| What is the last digit? It is 5. | 5,625 is divisble by 5 but not by 10. |
| Is 5,625 divisible by 6? | |
| Is it divisible by both 2 or 3? | No, 5,625 is not divisible by 2, so 5,625 is not divisible by 6. |
O Try It do livro logo depois deste exemplo: mesma ideia, outros números. Só a resposta é dada.
Determine whether 4,962 is divisible by 2, by 3, by 5, by 6, and by 10.
Como foi?