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Test of divisibility of 3, 9, 27, 37, 111, 333 or 999

Find test of divisibility of 9138431772

Step 1 Make groups of 3 digits from the end groups are as 9 138 431 772

Step 2 add all groups 9 + 138 + 431 + 772 = 1350

Step 3 Repeat same steps 1 and 2 it is 1 + 350 = 351 = 333 + 18

333 is divisible by 37 but 18 is not so 9138431772 is not divisible by 37


Note by Sunil Pradhan
6 months, 2 weeks ago

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Yup, this is just divisibility rules. Great work! Pi Han Goh · 6 months, 2 weeks ago

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@Pi Han Goh Thanks. Still more to share. Sunil Pradhan · 6 months, 2 weeks ago

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@Sunil Pradhan Please do share!! =D Pi Han Goh · 6 months, 2 weeks ago

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