| Aspect | Description |
| First 20 natural numbers | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 |
| Formula | n(n+1)/2 |
| Value of n | 20 |
| Calculation | = 20(20+1)/2 = 10(21) |
| Final answer | 210 |
Which of the following is the sum of the first 20 natural numbers?
Question: Which of the following is the sum of the first 20 natural numbers?
A 200
B 205
C 210
D 215
Answer: 210