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finlep [7]
3 years ago
10

Insert a digit to make numbers that are divisible by 15 if it is possible 89…0

Mathematics
1 answer:
CaHeK987 [17]3 years ago
7 0

Answer:

1 or 4 or 7

Step-by-step explanation:

The number is divisible be 15, that means it is divisible as by 5 and as by 3

(5*3=15).  The number is divisible by 5 if the last digit is 0 or 5.

In our case the last digit is 0 so the number is divisuble by 5 anyway.

The number is divisible by 3 if the sum of its digits is divisible by 3.

The sum of digits is 8+9 =17 .   17 is not divisible by 3, however 18,21 or 24 are divisible by 3

So instead ... 1 ( to get sum 18), or 4 ( to get sum 21) or 7 (to get sum 24) can be written

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