Question

(57-55)+(55-51)+(51-45)+(45-37)+(37-27)+(27-15)+(15-1)=

Answer 1

(57-55)+(55-51)+(51-45)+(45-37)+(37-27)+(27-15)+(15-1)=2+4+6+8+10+12+14=56

Answer 2

(57-55)+(55-51)+(51-45)+(45-37)+(37-27)+(27-15)+(15-1)

=56