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Convert the binary number 10101 to its decimal equivalent.
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Solution: Step 1: Understand binary to decimal conversion Step 2: Calculate positional values for 10101: (1 * 2⁴) + (0 * 2³) + (1 * 2²) + (0 * 2¹) + (1 * 2⁰) Step 3: Perform calculations: = (1 * 16) + (0 * 8) + (1 * 4) + (0 * 2) + (1 * 1) = 16 + 0 + 4 + 0 + 1 = 21
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