Strobogrammatic number Strobogrammatic number A strobogrammatic number is a number whose numeral is rotationally symmetric, so that it appears the same when rotated 180 degrees. In other words, the numeral looks the same right-side up and upside down (e.g., 69, 96, 1001). A strobogrammatic prime is a strobogrammatic number that is also a prime number, i.e., a number that is only divisible by one and itself (e.g., 11). It is a type of ambigram, words and numbers that retain their meaning when viewed from a different perspective, such as palindromes. When written using standard characters (ASCII), the numbers, 0, 1, 8 are
Infinity on High inside the top five worldwide in countries including Canada, the United Kingdom and Australia. "Infinity on High" has sold over two million units worldwide, with 1.4 million sales in the US as of February 2013. Five of the album's fourteen songs were released as singles, of which three charted on the "Billboard" Hot 100, led by the single "This Ain't a Scene, It's an Arms Race" at number two. The album was certified Platinum by the Recording Industry Association of America (RIAA) on March 12, one month after its release, for shipments of one million copies. It received generally positive