, 01.02.2020rhaineandreirefuerzo

# What is the sum of all prime numbers between 10 and 30

All prime numbers between 10 and 30: 11, 13, 17, 19, 23, 29.

Solution:

= 11 + 13 + 17 + 19 + 23 + 29

= 41 + 19 + 23 + 29

= 60 + 23 + 29

= 83 + 29

= 112

the prime numbers between 10 and 30 are: 11,13,17,19,23,29

All prime numbers between 10 and 30: 11, 13, 17, 19, 23, 29

11+13+17+19+23+29=112
*All prime numbers between 10 and 30: 11, 13, 17, 19, 23, 29.

FORMULA: Sn = n(a1 + a2) / 2

S6 = 6(11 + 29) / 2

S6 = 6(40) / 2

S6 = 240 / 2

S6 = 120

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