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प्रश्न
Test the divisibility of the following numbers by 7:
826
उत्तर
To determine if a number is divisible by 7, double the last digit of the number and subtract it from the number formed by the remaining digits. If their difference is a multiple of 7, the number is divisible by 7.
826 is divisible by 7.
We have 82 − 2 × 6 = 70, which is a multiple of 7.
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