For any positive integer n, the length of n is defined as the number of prime factors whose product is n. For example, the length of 75 is 3, since 75 = 3 x 5 x 5. How many two-digit positive integers have length 6?
a. none
b. one
c. two
d. three
e. four
Can any one explain on this please.?
Length based on prime factor
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- dumb.doofus
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I think there's jsut two 64 and 96 (post edited)
Last edited by dumb.doofus on Sun May 17, 2009 12:33 am, edited 1 time in total.
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yeah missed out on this one.
I don't see a simpler way other than just checking it manually..
I don't see a simpler way other than just checking it manually..
One love, one blood, one life. You got to do what you should.
https://dreambigdreamhigh.blocked/
https://gmattoughies.blocked/
https://dreambigdreamhigh.blocked/
https://gmattoughies.blocked/