Brain Teaser
- Thread starter glarrivee
- Start date
3263442 ?
took me 1 min, but then 2min to find calculator to work out the final answer. So I reckon I must be an engineer as I can never find the tool I want!
Try this;
62 - 63 = 1
clearly this is wrong.
Make it right by moving one digit to somewhere else in the equation.
Dave
took me 1 min, but then 2min to find calculator to work out the final answer. So I reckon I must be an engineer as I can never find the tool I want!
Try this;
62 - 63 = 1
clearly this is wrong.
Make it right by moving one digit to somewhere else in the equation.
Dave
Doc Watson
Lifetime Supporter
yes...
3263442
(n-1) +1 x (n-1) to get n
1, 2, 6, 42, 1806
( 1+1) x 1 = 2
( 2+1) x 2 = 6
( 6+1) x 6 = 42
(42+1) x 42 =1806
(1806+1) x 1806 =3263442
1 minute to work out 5 minutes to write this... ;-)
3263442
(n-1) +1 x (n-1) to get n
1, 2, 6, 42, 1806
( 1+1) x 1 = 2
( 2+1) x 2 = 6
( 6+1) x 6 = 42
(42+1) x 42 =1806
(1806+1) x 1806 =3263442
1 minute to work out 5 minutes to write this... ;-)
I got the formula for it in less than a minute, but like you, took a little time to
actually work out the math.
For yours - 6^2 - 63 = 1 (just move the "2" into a superscript, not add the caret).
I guess this is when I pitch that using your fingers, you can count to 1023. Just be
careful when you hit 4.
Ian
Ian Anderson
Lifetime Supporter
Accountant?
About 30 secs to do the first calculation!
Hell I'm sad!
Ian
About 30 secs to do the first calculation!
Hell I'm sad!
Ian
Ian K,
I think your 6^2 was a slip of the keyboard, and you got it right anyway, the answer is 2^6 (two to the power of 6) - 63 = 1
Dave
I think your 6^2 was a slip of the keyboard, and you got it right anyway, the answer is 2^6 (two to the power of 6) - 63 = 1
Dave
For the first one I must be a natural engineer as I saw it as soon as I looked at it. The math answer took about 30 seconds in my head. Man, you mean I have been in the wrong profession all these years????
The second I have seen before.
Bill
The second I have seen before.
Bill
Bill,
if you mean that you can do 1806^2 in your head in a few seconds, I think that's pretty exceptional.:thumbsup:
I could manage the 42^2 in my head, but not the 1806^2:embarassed:
regards
Dave
if you mean that you can do 1806^2 in your head in a few seconds, I think that's pretty exceptional.:thumbsup:
I could manage the 42^2 in my head, but not the 1806^2:embarassed:
regards
Dave
About 8 seconds it took me longer to find the calculator than to figure out the sequence.
I have to ask..and translate..
...
...Sorry - I guess I should have correctly explained why:
The first digit is 2^0 in binary (0 or 1), so the correct sequence is 1, 2, 4, 8 ...
or 2^0, 2^1, 2^2, 2^3 ... up to 2^9. So, the total is the last finger (512 or 2^9) plus
all of the rest (511 or (2^9)-1).
Ian
