Question

29. If 78*3945 is divisible by 11, where is a digit,
then * is equal to
(a)0
(b)1
(c)3
(d)5

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Answer 1

Answer:

3 is right answer

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Answer 2

Answer:

the right answer is 5. ( option D )

Step-by-step explanation:

Let that digit be x

7+x+9+5-(8+3+4)=11 [using the rule of divisibility of 11 which states that a number is divisible by 11 if the difference of sum of its digits at odd places and sum of digits at even places is zero or eleven]

=> 21+x-15=11

=> x=5