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sladkih [1.3K]
3 years ago
9

How many 2-digit numbers are multiples of either 5 or 7?

Mathematics
2 answers:
Murljashka [212]3 years ago
5 0

Answer:

46

Step-by-step explanation:

Ktuvouyhouhyobuyoubyoubuybooybuouybuyobbouyouybouybobuyob

Svet_ta [14]3 years ago
4 0

Answer:

46

Step-by-step explanation:

he count of numbers from 1 to n that are divisible by k is integer part of (n/k).

So the numbers from 1 to 99 divisible by 3 is int(99/3) = 33

Those divisible by 5: int(99/5) = 19

From the sum of those two, subtract those divisible by 15 = int(99/15) = 6

That gives you 33+19-6 = 46.

Now subtract the 1 digit numbers: 3, 5, 6, 9, or four of them

46 - 4 = 42 is the answer.

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