Question

How many number of two-digit positive integer than 100, which are not divisible and
5 is​

Answer 1

Step-by-step explanation:

3 , 15 , 27, 39.....

First we need to calculate 54th term

We know that

aₙ = a + (n -1 )d

Here, a =3

d = 15 -3 =12

n = 54

Putting values in formula

a₅₄ = a + (n-1)d

= 3 + (54-1) ₓ12

=3 + 53 ₓ 12

= 3 + 636

= 639

So 54th term a₅₄

132 + 639

= 771

Therefore aₙ = 771

Putting value in formula

aₙ = a + (n-1)d

771 = 3 +(n-1) ₓ 12

771 -3 = (n-1) ₓ 12

768 /12 = n-1

64 = n-1

n = 65

65th term is 132 more than 54th term

Answer 2

Answer:

Now integers are not divisible by 2 & 5 then, Integers ends with 0,2,4,5,6,8 will not include. Therefore 25 positive integers not greater than 100 are not divisible by 2,3 or 5.

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