Can you Pass Stanford University Admission Simplification Problem ?

[@silviamunoz6863]

Sorry, but it would be easier and faster simply calculate 81x81x81x81x80

[@historiaamiga]

Mais fácil impossível

[@TheNizzer]

20 minutes! Fail. 81^4x80 by simple factorisation. That’s 81x81x81x81x80. Hardly challenging. Maybe a minute?

[@rainerrosenberger9111]

His solution is real rubbish, good for nothing and complicated

[@firozuttauheed6173]

????

[@TheNizzer]

@@firozuttauheed6173 Factorise 81^5-81^4 to 81^4(81-1). Leads to 81^4x80….etc

[@laogui2425]

Applying the binomial expansion of (80+1)^4 and expressing 80 as 2^3*10 (80+1)^4=2^12*10000+4*2^9*1000+6*80^2+4*80+1=40960000+2048000+38400+321=43046721 80*43046721=3443737680 2-3 minutes ... your working was incredibly tedious It's very easy mental arithmetic really.

[@rarocon]

why not going on with 9²up5 - 9² up4= 9up10 - 9up8 = 9up8(9² - 1)?

[@steveocken]

6561*6561 requires knowing 6561*5=65610/2 = 32805 , then adding 6561 to get 6561*6 = 39366. The rest is place-value adjusted addition. It is unclear why the speaker does not assume knowledge of the basic multidigit multiplication algorithm, but rather uses a difficult restatement of that algorithm using powers of x = 100..

[@superacademy247]

Thanks for sharing your approach to the problem! 💯💕🤩You're right, it's important to understand the underlying concepts, not just memorizing algorithms. 💯

[@steveocken]

Algorithms are essential theorems.

[@Pensfold]

Occam's Razor woukd say just multply out the numbers at step one.

[@rhrodri]

no era mas facil con una calculadora ?

[@superacademy247]

Calculators NOT allowed 🤗

[@muontran8589]

You did too long.I can do in 1 minute.!!!!

[@researchman12001]

Too complicated!

[@ernestor6393]

If calculate right answer : 3,486,780,385 ,😂😂😂

[@azizurrehmanbaig8030]

Unnecessary expansion of this video

[@superacademy247]

Demonstration of authority over algebra 🙏🥰💕

[@historiaamiga]

Fazer o mais simples é mais facil

[@bonifaciohernandez7214]

i did it in 2minutes

[@francodefazio431]

You have done it again, I have stopped watching your videos now as you are time wasting

[@superacademy247]

Thanks for the view. Sorry to hear that!😳

[@MrAlan0151]

bit long winded

[@antonioalbendiz4511]

The solution given is quite silly. A waste of time. Una solucion engorrosa, tediosa. I suppose it is not true to offer that solution in order to book in Stanford U. Really boring.

[@superacademy247]

The solution given is ingenious 💪💪💪

[@DanToomey-j8n]

Fire ring law. Y,9. 1x⁴