Question

If 21x5 is a multiple of 9, where x is a digit, what is the value of x?​

Answer 1

Answer:

After doing questions I can say some logical tips.

21x5 is a multiple of 9

that means 21x5 is divided by 9.

we know that any number add its digit and its come in 9 of multiple that also divided by 9.

That means the sum of digit of number 21x5 = (2+1+x+5)=9

8+x=9

x=9-8

x=1

Thus,

the number be 2115.

I hope it is useful for you.

please make me brainliest.

Thanks

Answer 2

Answer:

ur answer is 1

Step-by-step explanation:

sum of digit of number = 21x5

(2×1+x+5)= 9

therefore 8+x=9

x= 9-8

x= 1