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How many 3 digit numbers are divisible by 7.. question from chapter 5 arithmetic progression |
| Answer» The Ap\'s formed are - 105 , 112 , .....994 . An = a + (n-1) d => 994 = 105 + (n-1) 7 => 889 = 7n - 7 => 896 /7 = n => n = 128 So, 128 three digits number are divisible by 7.. | |