Question

A number abcde when multiplied by 13 form a number purely by 9. That number is divisble by??

Answer 1

Answer:

Step-by-step explanation:

Here, A x A= 9 i.e. A x A is the number 9 or a number whose unit’s digit is 9. Thus, the number whose product with itself produces a two-digit number having its unit’s digit as 9 is 7.

i.e. A x A = 49 => A=7

Now, 5 x A + 4 = 39

=> 5 x 7+4 = 39

So, A satisfies the product.

Hence, the value of A is 7.