Question

its a question of mental ability,tge question is give that 1st whole box = 18 , 2nd whole box = 17 , and the balue of 3rd whole box is unknown and we have to find it​

Answer 1

Answer:

16?...I'm sry, I just can't the relation

Answer 2

17

536+238=774

774=7+7+4=18

498+275=773

773=7+7+3=17

642+185=827

827=8+2+7=17

I guess 17 might be the answer