Answer :
Answer:
378
Step-by-step explanation:
nth triangular number: n(n+1) / 2
27th triangular number: 27(27+1) / 2 = 27*28 / 2 = 378
Answer:
378
Step-by-step explanation:
nth triangular number: n(n+1) / 2
27th triangular number: 27(27+1) / 2 = 27*28 / 2 = 378