Entre los siguientes números, encuentre los que son múltiplos de 2, 3, 5 y 10: 235, 360, 487, 564, 681, 792, 854, 904
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Understand the Problem
La pregunta te pide identificar, de la lista de números dada (235, 360, 487, 564, 681, 792, 854, 904), cuáles son múltiplos de 2, 3, 5 y 10. Es decir, cuáles de esos números pueden dividirse exactamente por 2, 3, 5 y 10.
Answer
360
Answer for screen readers
360
Steps to Solve
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Divisibility rule for 2: A number is divisible by 2 if its last digit is even (0, 2, 4, 6, or 8). Applying this rule to the list:
- 360, 564, 792, 854, and 904 are divisible by 2.
- 235, 487, and 681 are not divisible by 2.
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Divisibility rule for 3: A number is divisible by 3 if the sum of its digits is divisible by 3. Applying this rule to the list:
- For 235: $2 + 3 + 5 = 10$, which is not divisible by 3.
- For 360: $3 + 6 + 0 = 9 $, which is divisible by 3.
- For 487: $4 + 8 + 7 = 19$, which is not divisible by 3.
- For 564: $5 + 6 + 4 = 15$, which is divisible by 3.
- For 681: $6 + 8 + 1 = 15$, which is divisible by 3.
- For 792: $7 + 9 + 2 = 18$, which is divisible by 3.
- For 854: $8 + 5 + 4 = 17$, which is not divisible by 3.
- For 904: $9 + 0 + 4 = 13$, which is not divisible by 3. So, 360, 564, 681, and 792 are divisible by 3.
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Divisibility rule for 5: A number is divisible by 5 if its last digit is either 0 or 5. Applying this rule to the list:
- 235 and 360 are divisible by 5. -The reset of them are not divisible by 5.
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Divisibility rule for 10: A number is divisible by 10 if its last digit is 0. Among the initial list, only 360 is divisible by 10.
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Find the numbers that satisfy all conditions: We need to find numbers that are divisible by 2, 3, 5, and 10.
From step 1, the numbers divisible by 2 are: 360, 564, 792, 854, and 904. From step 2, the numbers divisible by 3 are: 360, 564, 681, and 792. From step 3, the numbers divisible by 5 are: 235 and 360. From step 4, the numbers divisible by 10 are: 360.
The only number that satisfies all four conditions (divisible by 2, 3, 5, and 10) is 360.
360
More Information
The number 360 is divisible by 2, 3, 5, and 10. $360/2 = 180$, $360/3 = 120$, $360/5 = 72$, and $360/10 = 36$.
Tips
A common mistake is to only check for divisibility by one or two of the numbers, instead of all four. Another mistake is misapplying divisibility rules.
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