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प्रश्न
Find which of the following numbers are divisible by 3:
(i) 261
(ii) 777
(iii) 6657
(iv) 2574
उत्तर
A number is divisible by 3 if the sum of its digits is divisible by 3,
So, 261, 777, 6657, 2574 are divisible by 3.
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