How many two-digit numbers are divisible by 6?

Topic: Number System
Subtopic: Arithmetic Progressions

A13

B14

C15

D16

Explanation

Two-digit numbers divisible by 6: 12, 18, 24, …, 96. This is an AP with a=12, d=6, l=96. 96 = 12 + (n-1)*6 => 84 = (n-1)*6 => n-1 = 14 => n = 15.

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