Question

(1+2+3...+14):(1+2+3+..+6) VA ROG UREGNT DAU CORoana​

Answer 1

$1 + 2 + 3 + ... + 14 = \\ = 14 \times(14 + 1) \div 2 = \\ = 14 \times 15 \div 2 = \\ = 7 \times 15 = \\ = 105$

$1 + 2 + 3 + ... + 6 = \\ = 6 \times (6 + 1) \div 2 = \\ = 6 \times 7 \div 2 = \\ = 3 \times 7 = \\ = 21$

(1+2+3...+14):(1+2+3+..+6)=

=105:21=5