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प्रश्न
Test the divisibility of the following numbers by 7:
117
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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.
117 is not divisible by 7.
We have 11 − 2 × 7 = −3, which is not a multiple of 7.
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|
Number |
Divisible by |
||||||||
|
2 |
3 |
4 |
5 |
6 |
8 |
9 |
10 |
11 |
|
|
128 |
Yes |
No |
Yes |
No |
No |
Yes |
No |
No |
No |
|
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|
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|
275 |
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|
6686 |
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|
639210 |
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|
429714 |
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|
2856 |
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|
3060 |
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|
406839 |
______ | ______ | ______ | ______ | ______ | ______ | ______ | ______ | ______ |
