Question : The sum of three consecutive natural numbers divisible by 3 is 45. The smallest number is:
Option 1: 18
Option 2: 3
Option 3: 12
Option 4: 9
Correct Answer: 12
Solution : Let the three consecutive numbers divisible by 3 be (x – 3), x, and (x + 3). According to the question, (x – 3) + x + (x + 3) = 45 ⇒ 3x = 45 ⇒ 3x = 45 ⇒ x = $\frac{45}{3}$ = 15 So, the numbers are 12, 15 and 18. Hence, the smallest number is 12.
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