1 and 36
Yes. 1 is both square and triangular.
1225
36 is the only square number that is also a triangular number between 20 and 40.
They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.
144 is a square number, not a triangular number.
36 is the smallest non-trivial number. It is both square and triangular.
36 is a triangular number, Square number and also a Consecutive number.
1, the first triangular number, is also a square.
It is 13 squared, but it's not a triangular number
1 is a triangular and square number, and it is less than 60.
A number, t, is a triangular number if (1 + 8t) is a square of an odd number.
yes because they both have 5 faces