Question

find the no of term from 1 to 1000 which divisible by 7​

Answer 1

Answer:

100terms

Step-by-step explanation:

till digit 70

10 terms are divisible by 7

hence by 490-49

hence by 980 by-98

thence by then 987 994

totally 100

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Answer 2

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 ➺..First, we should write the series of number which are divisible by 7 ;

7 , 14 , 21 , ……… , 994

Mathematics formula of series of same different between all two elements of the given AP

Formula is :-

L = a + (n - 1)d

So , here

L = last number = 994

a = first number = 7

n = no. of numbers divisible by 7 ?

d = difference between 1st, 2nd term= 7

So we put all value in formulaz

994 = 7 + (n - 1) 7

994 - 7 = (n - 1) 7

987 = (n - 1 ) 7

987 / 7 = n - 1

n - 1 = 141

So, n = 142

∴ 142 numbers are between 1 to 1000 which are divisible by 7 .

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