Harvard University Admission Interview Tricks | Calculators NOT Allowed.✍️🖋️📘💙

[@TonyFisher-lo8hh]

Do they no longer teach elementary geometric series? Used to be a feature of elementary algebra!

[@НеллиПшено]

Решаем методом устного счета. 13^3×170+13^2×170+14= 170×169×14+14=402234. Good luck!

[@lalasofy]

13^5=169”169”13=29000”13=87000+290000=377000 so 377000*29000*2200*169*13=trillions

[@yakovspivak962]

X = (13^6 -1) / 12

[@herbertklumpp2969]

Why not = ( 13^6-1)/(13-1) = (13^3 +1)(13^3-1)/ 12 = 2196÷12* 2198= 183* 2198 now multiply thats all

[@valeriykotlov2763]

Don’t envy your students

[@bobhaigh-u7m]

13x13=169x13=2197x13=28561x13=371293 371293+28561+2197+169+13+1=402234 This question hardly needs a trick to solve it.

[@nantesloire]

Quatsch.

[@mokhlesuzzaman]

Simply, (13**6-1)/(13-1)=(13**6-1)/12= (4828809-1)/12=4826808/12=402234