Question

How many two numbers divisible by 13

Answer 1

Answer:

Step-by-step explanation:

So you are trying to find all the multiples of 13 which are less than 100.

So you can think it as total number of terms in the sequence 13,26,39,…..,91 [91 is largest 2-digit number divisible by 13]

Now you can observe it is an Arithmetic progression with first term =13 , last term = 91 and common difference = 13

In an A.P.

Last term = first term + (no. Of terms -1)* common difference

Putting the values in above equation we get

91 = 13+(no. of terms-1)* 13

=> 78 = (no. of terms-1) *13

=> no. Of terms - 1 = 78/13=6

=> no. of terms = 7

So there are 7 2-digit numbers divisible by 13

Answer 2

Answer:

Step-by-step explanation:

1 and 13are that only no.s divisible by 13