Question

The digit by which * should be replaced in 54*281 so that the number formed is divisible by 9 is *



a 6

b 7

c 9

d 8​

Answer 1

Answer:

b) 7

Step-by-step explanation:

For a number to be divisible by 9, the sum of its digits should be divisible by 9.

Sum of digits= 5 + 4 + 2 + 8 + 1

= 20

Now 9 * 3 = 27

Since 27 is close to 20

Therefore b) 7 is the answer

Answer 2

Answer:-

As we know the divisibility rule of 9 is: That sum of it should be , divisible by 9

So,

Let's check it one by one

$\boxed{\blue{Putting \: value \: as\: 6}}$

=> 5+4+6+2+8+1

=> 26

THUS, it is not divisible by 9

$\boxed{\red{Putting\: value \: as \: 7}}$

=> 5+4+7+2+8+1

=> 27

THUS, it is divisible by 9

$\boxed{\blue{Putting \: the \: value \: as \: 9}}$

=> 5+4+9+2+8+1

=> 29

THUS, it is not divisible by 9

$\boxed{\green{ Putting\: the \: value \: as \: 8}}$

=> 5+4+8+2+8+1

=> 28

THUS, it is not divisible by 9

Therefore, b is the answer

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