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What is the largest number you can write with just three digits? (Discussion)
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ankita said – Wed, 06 Aug 2008 07:10:31 -0000 ( Link )
9 ^ 99 (9 to the power of 99) which calculates out as
9 * 9 * 9 * 9 * 9 * 9 * 9 ... and so on 99 times.The correct answer, however, if you extend the idea even further ends up as…
9 ^ 9 ^ 9 (9 to the 9th power of 9).
Work out the second and third powers first ( 9 * 9 * 9 * 9 * 9 * 9 * 9 * 9 * 9 = 387420489. ) We can therefore restate
the sum as 9387420489 which works out as…. very very big indeed.
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