Reply To: Challenge Questions – 2

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#33028
Satya
Participant

This is what I noticed while checking if a given 3 numbers set form a triple, using digit sum –

step 1: find the digit sum of the 3 numbers
step 2: square each number
step 3: find the digit sum after squaring
step 4: one of the numbers is 9 while the other two are equal.

e.g: 77, 36, 85
step 1 – 5, 9, 4
step 2 – 25, 81, 16
step 3 – 7, 9, 7

e.g2: 39, 80, 89
step 1 – 3, 8, 8
step 2 – 9, 64, 64
step 3 – 9, 1, 1

65, 72, 97
2, 9, 7
4, 81, 49
4, 9, 4

3,4,5
9,16,25
9,7,7

error:
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