Question 55

How many two-digit numbers are divisible by 3?

Solution

The least 2-digit number divisible by 3 = 12
The highest 2-digit number divisible by 3 = 99
99 = 12 + (n-1)3
(n-1)3 = 87
n = 30
There are 30 2-digit numbers divisible by 3.

Answer is option A.

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How many two-digit numbers are divisible by 3?

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