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The decimal number 42 is represented in base 3 as 1120. What is the hexadecimal representation of 42?

1. 2A
2. 28
3. 24
4. 528

Correct answer: 2A

Solution

The hexadecimal representation of a decimal number is obtained by converting the decimal value directly to base 16. For the decimal number 42, the conversion results in 2A, where '2' represents 2 times 16 and 'A' represents 10, summing to 32 + 10 = 42.

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