Question

which of the following digits should replace* in the number 3*878 so that it is divisible by 7​

Answer 1

Answer:

31878

Step-by-step explanation:

shud start with number 1 which is perfectly divisible by 7,

45×7=315,remainder 378 which is perfectly divisible by 7..so answer is 31878

Answer 2

Answer:

1 is perfectly divisible by 7,

so, 31878 is our number.

45×7=315 remainder is 378 is perfectly divisible by 7.

So, 1 and 7 is our two correct alternatives.

therefore,answer is 1 and 7.