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3 years ago

How many positive numbers from 1 to 999 have the sum of

Mathematics

1 answer:

Elenna [48]3 years ago

5 0

Answer:

45 positive numbers have the sum of their digits equal to 8

Step-by-step explanation:

given data

number = 1 to 999

sum n = 8

to find out

positive numbers

solution

we will choose number by this formula

(n+1) (n+2) / 2

here n is 8

so put this value we get number that

positive numbers = (n+1) (n+2) / 2

positive numbers = (8+1) (8+2) / 2

positive numbers = 90 / 2

so 45 positive numbers have the sum of their digits equal to 8

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