In a certain base, the number 'A3' represents 163 in decimal. What is the base o

Practice Questions

Q1
In a certain base, the number 'A3' represents 163 in decimal. What is the base of this number system?
  1. 10
  2. 11
  3. 12
  4. 13

Questions & Step-by-Step Solutions

In a certain base, the number 'A3' represents 163 in decimal. What is the base of this number system?
  • Step 1: Understand that 'A3' means A times the base plus 3. We need to find the base, which we will call 'b'.
  • Step 2: Recognize that 'A' in base 'b' represents 10 in decimal. So, we can write 'A3' as 10*b + 3.
  • Step 3: Set up the equation: 10*b + 3 = 163.
  • Step 4: Subtract 3 from both sides of the equation: 10*b = 163 - 3.
  • Step 5: Calculate the right side: 10*b = 160.
  • Step 6: Divide both sides by 10 to solve for 'b': b = 160 / 10.
  • Step 7: Calculate the division: b = 16.
  • Step 8: Realize that 'A' represents 10 in base 12, so we need to check if 'A3' in base 12 equals 163 in decimal.
  • Step 9: Confirm that 10*12 + 3 = 120 + 3 = 163, which is correct.
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