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प्रश्न
Test the divisibility of the following numbers by 7:
826
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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.
826 is divisible by 7.
We have 82 − 2 × 6 = 70, which is a multiple of 7.
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संबंधित प्रश्न
Test the divisibility of the following number by 3:
872645
Test the divisibility of the following number by 4:
946126
Test the divisibility of the following numbers by 5:
723405
Test the divisibility of the following numbers by 7:
14126
Test the divisibility of the following number by 11:
83721
Write (T) for true and (F) for false against the following statement:
If a number divides the sum of two numbers exactly, it must exactly divide the numbers separately.
Write (T) for true and (F) for false against the following statement:
If a number is divisible by 3 and 7, it must be divisible by 21.
Which of the following numbers is divisible by 8?
Which of the following numbers is divisible by 11?
Why are divisibility tests useful?
