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Among the numbers 574, 658, 821, 945, 247, if 1 is subtracted from the 1st digit of each number, then how many numbers thus formed will be divisible by 3?
1. Two
2. One
3. Three
4. Four

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Correct Answer - Option 3 : Three

Subtracting one from first digit of each number and dividing by three we get

574 → 474 ÷ 3 = 158

658 → 558 ÷ 3 = 186

821 → 721 ÷ 3 = 240.33

945 → 845 ÷ 3 = 281.67

247 → 147 ÷ 3 = 49

There are three such number which are divisible by three.

Hence, "Three" is the correct answer. 

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