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Semiprime Names (Posted on 2010-12-06) Difficulty: 3 of 5
Six is a semiprime (the product of two primes). Its name, written in English, has 3 letters and 3 is one of the two primes that produce 6.

What 2-digit semiprime is like that?

What is the smallest such 3-digit semiprime?

What is the smallest such 4-digit semiprime?

Consider two cases for each:

  • Use the word "and" in all numbers such as "one-hundred and one".
  • Don't use the word "and" in those numbers.

In any event, don't use locutions such as "nineteen hundred"; rather, use "one thousand nine hundred" for this example.

See The Solution Submitted by Charlie    
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Some Thoughts 1st couple -partial spoiler | Comment 1 of 2
2 digit answers  (my D1 CHOICES):
thirtythree =11*3      thirtythree       has 11 letters  
thirtyandnine=13*3   thirtyandnine   has 13 letters  

  Posted by Ady TZIDON on 2010-12-06 14:46:21
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