let 56a be a three digit number , where a is a prime number then a56 =56a+6a5 can't - Maths - Number Systems

Question

let 56a be a three digit number , where a is a prime number then
a56 =56a+6a5 can't be divisible by a 3 2 37 c 18 d 22

Md. Ateequr Rahman · Accepted Answer

Dear Student

In the question:
a56 = 56a + 6a5
If on comparing the unit place 6=a+5, therefore a=6-5=1
a=1 which is not prime which contradicts the question as a is
supposed to be prime

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Regards

let 56a be a three digit number , where a is a prime number . then a56 =56a+6a5 can't be divisible by a. 3 2. 37 c. 18 d. 22