Reply To: Challenge Questions – 2

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#33022
Preeti Pathak
Participant

Hi,

challenge question-19

we need to verify if 77 , 36 and 85 is a triple by checking their digit sums.

77 ^2 + 36 ^2 = 85^2

Their corresponding digit sums will be,

L.H.S= 5 ^2 + 9 ^2

=digit sum(25 + 18)

=7+9= 7

R.H.S=4 ^2

=digit sum(16)=1+6=7

L.H.S=R.H.S

since their digit sums are same, we can say that 77,36 and 85 is a triplet.

Thanks

 

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