Question

how many 2 digit numbers are divisible by 2?​

Answer 1

Answer:

45 two digit numbers divisible be 2

Step-by-step explanation:

The two digit numbers are 10 to 99 . So there are 90 two digit numbers. Half of them are even, so 45 two digit numbers are divisible by 2

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Answer 2

Answer:

45 two digit numbers are divisible by 2

Step-by-step explanation:

Two digit numbers divisible by 2 are

10, 12, 14..........98

This forms an A.P where

a = 10

d = 2

an = 98

By using formula

an = a + ( n - 1) d

98 = 10+ (n-1) ×2

98 = 10 + 2n - 2

98 = 8 + 2n

2n = 98 - 8

2n = 90

n = 45

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