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2^(10n) (Posted on 2015-04-15) Difficulty: 2 of 5
210 = 1024
220 = 1048576
Note that raising 2 to each of the first two multiples of 10 results in a number whose first digit is 1.

Find the smallest multiple of 10 where 2 raising to that power results in a number that does not begin with 1.

  Submitted by Jer    
Rating: 1.0000 (1 votes)
Solution: (Hide)
The smallest multiple of 10 is 300.

2300 > 2*1090

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re(4): worked outCharlie2015-04-17 14:09:41
Hints/Tipsre(3): worked outAdy TZIDON2015-04-17 01:48:20
re(2): worked outCharlie2015-04-16 08:06:54
Some Thoughtsre: worked outAdy TZIDON2015-04-15 09:35:29
Solutionworked outCharlie2015-04-15 09:01:19
Answer onlyAdy TZIDON2015-04-15 08:05:28
Answer onlyAdy TZIDON2015-04-15 08:05:28
SolutionSolution (spoiler)broll2015-04-15 08:05:15
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