0.0141
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0.006
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60 of them because 11*7 = 77 and 71*7 = 497
Using the tn formula, t1=56, the last number, tn=497, and d=7. Therefore, 497=56+(n-1)7. 448=7n, and n=64. So there are 64 numbers between 50 and 500 that are divisible by 7.
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