Question

how mang three digit numbers are divisible by 7?​

Answer 1

Answer:

1282

Step-by-step explanation:

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Answer 2

$\huge\star\underline\mathtt\purple{Answer:-}$

The first 3-digit number which is divisible by 7 is 105

The last 3-digit number which is divisible by 7 is 994

The list of 3-digit numbers divisible by 7 are

105, 112, 119,…..994 which forms an A.P

Consider a formula

T(n) = a + (n – 1)d

Where,

• a = 105

• d = 7

• T(n) = 994

• 994 = 105 + (n – 1)7

• 889 = 7n – 7

• 7n = 896

• n = 128

∴ There are 128 3-digits number which are divisible by 7.