In: Math
Calculate the values from the smallest number to the largest number
Add 2 to 1 that becomes 3
Add 3 to 3 that becomes 6
Add 4 to 6 that becomes 10
Add 5 to 10 that becomes 15
Add 6 to 15 that becomes 21
Add 7 to 21 that becomes 28
Add 8 to 28 that becomes 36
Add 9 to 36 that becomes 45
Add 10 to 45 that becomes 55
1+2+3+4+5+6+7+8+9+10 = 55