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प्रश्न
If 3 is the first triangular number, which is the tenth one?
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उत्तर
Typically, triangular numbers are:
1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, …
“If 3 is the first triangular number…”
This means we start counting from 3, not from 1.
1st → 3
2nd → 6
3rd → 10
4th → 15
5th → 21
6th → 28
7th → 36
8th → 45
9th → 55
10th → 66
66 is the tenth triangular number.
संबंधित प्रश्न
Find the square numbers from the list given below.
5, 9, 12, 16, 50, 60, 64, 72, 80, 81
Which are the triangular numbers in the given list?
3, 6, 8, 9, 12, 15, 16, 20, 21, 42
Name a number that is square as well as triangular.
If 4 is the first square number, which is the tenth one?
A pattern is defined as:
The pattern 1, 4, 7, 10, … increases by:
Which of the following equals 3²?
Consider the sequence: 2, 4, 6, 8, 10. Which pattern does it follow?
Triangular numbers are formed by which process?
