2^22 is not that hard to calculate, especially when 2^11 = 2048 is very straightforward to demonstrate. Do a bit of long muliplication to get 2^22 = 2048*2048 and then subtract 2. No need for tedius rigmarole.
Exactly what I did in about 1 minute. Less room for errors, too. And squaring 2048 is ridiculously easy because all the digits are powers of 2 so you just have to double 2048 and add 3 zeros. Double that answer and add 2 zeros. Double that answer and add one zero. Add the three lines and subtract 2 from the sum.
Most elementary approach is using 2^4 , as it provides 16^2 and 256^2 is easy, as 250+6 is easy. The remaining factor is 60+4. The calculation is dump, the way, I suggest it. But it is done in a single minute.
4^11 -2
= 4(4^10-1) + 2
= 4(2^20-1) + 2
= 4(2^10-1)(2^10+1)+2
= 4(1024-1)(1024+1)+2
let A=1000
=4(A+23)(A+25)+2
=4A^2 + 4*(23+25)A + 4*23*25 + 2
=4A^2 + 4*(50-2)A + (4*25)*23+2
=4A^2 + (200-8A) + 100*23 + 2
=4A^2 * 192A + 2302
=4000000
+_192000
+___2302
=4194302
2^22 is not that hard to calculate, especially when 2^11 = 2048 is very straightforward to demonstrate. Do a bit of long muliplication to get 2^22 = 2048*2048 and then subtract 2. No need for tedius rigmarole.
Exactly what I did in about 1 minute. Less room for errors, too. And squaring 2048 is ridiculously easy because all the digits are powers of 2 so you just have to double 2048 and add 3 zeros. Double that answer and add 2 zeros. Double that answer and add one zero. Add the three lines and subtract 2 from the sum.
3³³wèwemmqqq¹¹qwqǰqq @@LewishamPpleB4Profit
whoh I thought the exact opposite. Why waste time trying to do 2048*2048
Most elementary approach is using 2^4 , as it provides 16^2 and 256^2 is easy, as 250+6 is easy. The remaining factor is 60+4.
The calculation is dump, the way, I suggest it. But it is done in a single minute.
3sqrt5 =2sqrt5 +1sqrt5 or 1sqrt5 +2sqrt(only two ways possible)😊
Therefore,only solution a=20,5 or vice versa.
I think 2^22-2 would have been quicker….
I used my calculator and did it in less than 10 seconds.
2^10 = 1024
2^20 = 1048576 here double of 24 is 48 and square of 24 is 576
2^22 = 1048576 x 4 = 4194304
2^22 - 2 = 4194302
Why do you guys keep saying "equals to"?😂
Because it's English phrase
@superacademy247 No, it isn't!!
The correct phrase is "A equals B"
OR
"A is equal to B"
This easy interview i solve with mental arithmetic, a paper and a pencil faster than you.
Overworked
It is x TIMES y and not Into !! And b is not a p !!!
Dont be fussy. There are dif. Conventions
Plus it is his accent. Dont be rude. He is a very very smart gentleman.
@@cabiria0 I know that he is smart.Don't need YOU to see that. I am NOT being rude because I correct some things....
@@cabiria0 No,there are not.In one language...
@@irenehartlmayr8369 ur comment was utterly un-smart and rude. Sorry but that is what it is.
(2048*2048)-2=4194304-2=4194302
Took 2 minutes 54 seconds