Mathematics · Number System
Which of the following divisibility rules correctly determines if a number is divisible by 7?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The unit digit of the number is divisible by 7
- 2Doubling the last digit and subtracting it from the remaining truncated number yields a result divisible by 7✓
- 3The sum of the digits of the number is divisible by 7
- 4The last two digits of the number are divisible by 7
Correct answer
Doubling the last digit and subtracting it from the remaining truncated number yields a result divisible by 7
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