InterviewSolution
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Which of the following numbers is divisible by 12?1). 1832). 1923). 1624). 128 |
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Answer» A number is divisible by 12, if it is divisible by 3 and 4 A number is divisible by 3, if the SUM of its digits is divisible by 3, while a number is divisible by 4, if the LAST two digits of the number is divisible by 4 Hence, Considering number 183, ⇒ Sum of digits = 1 + 8 + 3 = 12, which is divisible by 3 ⇒ Last two digits = 83, which is not divisible by 4 Considering number 192, ⇒ Sum of digits = 1 + 9 + 2 = 12, which is divisible by 3 ⇒ Last two digits = 92, which is divisible by 4 Considering number 162, ⇒ Sum of digits = 1 + 6 + 2 = 9, which is divisible by 3 ⇒ Last two digits = 62, which is not divisible by 4 Considering number 128, ⇒ Sum of digits = 1 + 2 + 8 = 11, which is not divisible by 3 ⇒ Last two digits = 28, which is divisible by 4 ∴ The number 192 is divisible by 12 |
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