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1. | How many of the following numbers are divisible by 3 but not by 9 ? 2133, 2343, 3474, 4131, 5286, 5340, 6336, 7347, 8115, 9276 |
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Answer: Option B Explanation: Marking (/) those which are are divisible by 3 by not by 9 and the others by (X), by taking the sum of digits, we get:s 2133 9 (X) 2343 12 (/) 3474 18 (X) 4131 9 (X) 5286 21 (/) 5340 12 (/) 6336 18 (X) 7347 21 (/) 8115 15 (/) 9276 24 (/) Required number of numbers = 6. |

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