SOLUTION: which triangular number is this? it has three digits. it is a triangle number. it is paliindromic. the sum of its digits is prime.
Algebra.Com
Question 250027: which triangular number is this? it has three digits. it is a triangle number. it is paliindromic. the sum of its digits is prime.
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
Formula for triangular numbers.
=595
.
Ed
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