Change \(432_{five}\) to a number in base three.

Assessment: WAEC SSCE - General Mathematics - 2022 (Objective) Subject: General Mathematics

Question 1 Report

Change \(432_{five}\) to a number in base three.

Answer Details

Convert from base 5 to base 10

432five
 =  (4 x 52 2 ) + (3 x 51 1 ) + (2 x 50 0 )

= (4 x 25) + (3 x 5) + (2 x 1)

= 100 + 15 + 2

= 117ten

Then convert from base 10 to base 3

3 117
3 39 r 0
3 13 r 0
3 4 r 1
3 1 r 1
  0 r 1

Selecting the remainders from bottom to top:

117ten
 = 11100three

Hence; 432five
 =  11100three

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