Evaluate \( (212)_3 - (121)_3 + (222)_3 \)

Assessment: JAMB UTME - Mathematics - 2020 Subject: General Mathematics

Question 1 Report

Evaluate \( (212)_3 - (121)_3 + (222)_3 \)

Answer Details
The answer is (1020)3, which is equal to (1 * (3^3)) + (0 * (3^2)) + (2 * (3^1)) + (0 * (3^0)). In this question, each number is given in base-3 format, which means that each digit in the number represents a power of 3. For example, the number (212)3 is equal to (2 * (3^2)) + (1 * (3^1)) + (2 * (3^0)). To evaluate the expression, we simply add and subtract the numbers as written, and convert the result back to base-3 format.
Read lesson note on Number Bases (WAEC)
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