How MANY two-Digit Numbers are Divisible by 5 ? - Bzziii.com

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How many two-Digit numbers are divisible by 5 ?









Two-digit numbers divisible by 5 are 10,15,20,25 …………………95

We note that here the common difference(d) is 5.

Here the sequence is in arithmetic progression.

We can take a = 1 0 , d = 5 , l = 9 5

∴ `"a"_"n"` = a + (n − 1) d,

9 5 = 1 0 + (n − 1) 5,

n − 1 = 85/5,

n − 1 = 1 7,

n = 1 8.


Hence 18 two-digit numbers are divisible by 5.




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