Brain Teasers
Addition
Trick
Trick brain teasers appear difficult at first, but they have a trick that makes them really easy.Trick
1+2+4+8+16+32+64+... = 8
If the '+...' means that it goes on and on forever, how can you do only one thing to this to make the above equation equal?
RULES-
* You may only take away or add a symbol/ digit,
* OR, move a digit around,
* OR, put a digit on top or below to make a fraction, resize it to make it a power, etc
* OR change a digit into another one.
** You CANNOT change the = or ... ... signs.
If the '+...' means that it goes on and on forever, how can you do only one thing to this to make the above equation equal?
RULES-
* You may only take away or add a symbol/ digit,
* OR, move a digit around,
* OR, put a digit on top or below to make a fraction, resize it to make it a power, etc
* OR change a digit into another one.
** You CANNOT change the = or ... ... signs.
Hint
Why 8?Answer
Rotate the 8 ninety degrees to make an infinity sign.Hide Hint Show Hint Hide Answer Show Answer
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Comments
this should be in the trick not in the math. good one though!
Short and sweet. I got it ! Nice quiz !
But you can also make d left side of d expression raised to Zero and den multiply by 8
[1+2+4+8+16+32+64........]° * 8=8
[1+2+4+8+16+32+64........]° * 8=8
I love this one.
It's call a lemniscate.
Loved it! Made me think of Buzz Lightyear from Toy Story.
"To infinity and beyond!"
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