How many three digit numbers are divisible by 7 ?

Question

KnowledgeBoat · Accepted Answer

Three digit numbers which are divisible by 7 are 105, 112, ......., 994. Let there be n terms. In above series, a_n = 994, a = 105 and d = 7. By formula, ⇒ a_n = a + (n - 1)d ⇒ 994 = 105 + (n - 1) × 7 ⇒ 994 = 105 + 7(n - 1) ⇒ 994 - 105 = 7(n - 1) ⇒ 889 = 7(n - 1) ⇒ n - 1 = ⇒ n - 1 = 127 ⇒ n = 128. Hence, there are 128 three digit numbers, which are divisible by 7.

Mathematics

How many three digit numbers are divisible by 7 ?

AP GP

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Mathematics

How many three digit numbers are divisible by 7 ?

AP GP

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