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andrey2020 [161]
2 years ago
15

If the digits of a number add up to 9, what number is it divisible by?

Mathematics
2 answers:
Lelechka [254]2 years ago
8 0

Answer:

9 and also 3

Step-by-step explanation:

Numbers whose digits add up to 9 are divisible by 9. For example 18, 27, 36, 45, 54, 63, 72, 81 are all divisible by 9.

Numbers whose digits add up to any number divisible by three are divisible by three. So 237 has a digit sum of 2+3+7= 12. 12 is divisible by three, so 237 is divisible by three.

In this question any number with a digit sum of 9 is divisible by three as well as 9.

telo118 [61]2 years ago
7 0

Answer:

It's divisible by 9

Step-by-step explanation:

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Step-by-step explanation:

Example 1.5. A person goes shopping 3 times. The probability of buying a good product for the first time is 0.7.

If the first time you can buy good products, the next time you can buy good products is 0.85;  (I interpret this as, if you buy a good product, then the next time you buy a good product is 0.85).

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b) Only the second time that person buys a bad product.

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