How would we multiply the numbers 13680347,35702369 and 25692359 with 9
mentally? What is the pattern that emerges.
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we should calculate as 1 + 3+6+8+0+3+4+7=32 so this number is not divisible by 9 as after adding up all the digits of numbers the answer should be 9 but the answer was 32 and as we know 32 is not equal to 9
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