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Q.

Replace the star (*) in 394∗7 so that it may be divisible by 9.

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a

2

b

4

c

5

d

7

answer is B.

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Detailed Solution

Concept- A number must be divisible by 9 in order for the sum of its digits to likewise be divisible by 9. Here in the question, the number is incomplete, so we must figure out the missing digit to make the final number divisible by nine.
394*7 is the provided number. The sum of the digits must also be a multiple of 9 for the number to be divisible by 9.
The number's digits added together equal

In order for the total of

to be divisible by 9, the divisor must be 9, and 27 is the closest divisor to 23.
Hence,
Question Image

Question Image

Hence, the correct answer is option 2.

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