Can you Pass Stanford University Aptitude Test ?

[@davidbrisbane7206]

Now 81² + 25² + 14² =
(9²)² + (5²)² + 14⁴ =
(9² + 5²)² - 45² - 45² + 14⁴ =
(9² + 5² + 45)(9² + 5² - 45) - 45² + (14²)² =
(9² + 5² + 45)(9² + 5² - 45)
+ (14² + 45)(14² - 45) =
(81 + 25 + 45)(81 + 25 - 45)
+ (196 + 45)(196 - 45) =
(151)(61) + (241)(151) =
(151)[61 + 241] =
(151)(302)
So, [(9²)² + 5⁴ + 14⁴]/2 =
151²
So, √[(81² + 25² + 14²)/2] = 151

[@RealQinnMalloryu4]

{162+50+56}/2/=268/2=134 10^10^2^17 10^10^2^17^1 2^5^2^5^2^1^1 1^1^1^1^2 1^2 (x ➖ 2x+1).

[@FaerieDragonZook]

Let y = 7, x=2
(y+x)^4+(y-x)^4+16y^4 = 2(y^4 + 6x^2 y^2 + x^4) + 2(8y^4)
= 2( y^4+8y^4 + 2×3×x^2 y^2 + x^4)
= 2(3 y^2 +x^2)^2
= 2(3×49+4)^2 = 2(151)^2

[@Vega1447]

Stanford U have really dropped their standards if they use this as an entrance criterion. (They don't of course.)

[@xzxz214]

Stanford this time, eh?

[@harold1573]

?? wrong from the very beginning