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Triangular Numbers-Sudden death
Click all the numbers which that number of items can be arranged into a triangle.
or equivalent definition numbers in form n(n+1)/2
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Last updated: May 11, 2025
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| First submitted | May 11, 2025 |
| Times taken | 51 |
| Average score | 52.9% | Report this quiz | Report |
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18
120
91
876
11
45
3
24
6
21
351
256
36
69
15
16
34
210
66
1000
89
231
78
10
55
28
140
1
100
4
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