Question

the sum of the numbers lying between 10 to 100 which are divisible by 7 will be​

Answer 1

Answer:

Step-by-step explanation:

To solve is, we shall use the following formula -

t = a + (n-1) * d

where -

t = last term,

a = first term,

n = number of terms,

d = common difference.

Here,

t = 98 (98 is the last number between 10 and 100 to be divisible by 7)

a = 14 (14 is the first number between 10 and 100 to be divisible by 7)

d = 7(since every next number is supposed to be exactly divisible by 7)

n=?

Substituting these values in the formula,

98 = 14 + (n-1) * 7

98 - 14 = (n-1) * 7

84 =( n-1) * 7

12 = n-1

n = 13

Therefore, 13 numbers between 10 and 100 are divisible by 7

Answer 2

hope it will help you..

pls give 5 ratings