Triangular Thirty-six
2007-07-18 5:09 am
The integer 36 is a square number because it equals 6 x 6. Thirty-six is also a triangular number because it is the sum of the first eight positive whole numbers. Thirty-six is the smallest integer greater than one that is both a square and triangular number. Find the next two integers that are both square and triangular?
回答 (1)
2007-07-18 5:53 am
✔ 最佳答案
Integers are both square and triangular number:Number | Triangular | Square
1, 1, 1^2
36, Sum of 1 to 8, 6^2
1225, Sum of 1 to 49, 49^2
41616, Sum of 1 to 288, 204^2
2007-07-19 11:41:26 補充：
Typing mistake:The third one should be :X = 1225X = Sum of 1 to 49Sqrt of X = 35
參考: Excel
收錄日期: 2021-05-01 15:46:14
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