a palindrome
They all read the same way upside down.
Rotational symmetry of 180 degrees (but depends on the font).
9116
They're OIXZH
basicly if you write five numbers together, two that are the same over but only have five numbers on your calculator and tip it upside down then you will be happy :) 9696 or 6969 tip it updi down then it is the same :) Thanks Pengbeargirls!
a palindrome
1, 5, 8, and 0.
A circle or a square.
They all read the same way upside down.
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Yes, one cent. If they're still making pennies in the year 6009 they'll have the same problem. <joke> Remember that 1881 pennies also have their dates upside down but it's completely impossible to tell that because the numbers look the same either way. <more joke>
Rotational symmetry of 180 degrees (but depends on the font).
u rotated 180 degrees will be upside down and will look like an n. Sometimes answers changes when you say I in a question to be a u. If you are talking about capital I, it will look the same rotated 180 degrees. i will look like an exclamation mark upside down
They both read the same when rotated 180 degrees.
If you're upside down then 25-up
For the same reason it's upside down on ALL U.S. quarters. U.S. coins are all designed so that the opposite sides point 180° apart. Please look at your pocket change.