Harvard Entrance Exams || No Calculator Allowed

[@utpalpathak8438]

108*110+1 =(109-1)(109+1)+1 =109^2-1^2+1 =109^2

[@CharlesChen-el4ot]

（（108*110+1）^1/2 =（（ 108）^2+2*108+1）^1/2 =（（108+1）^2）^1/2 =109