 All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars  perplexus dot info  3 equal products (Posted on 2018-11-21) Lets take a number 12 as an example . It can be partitoned into three integer summands in 12 ways:
12=1+1+10
12=1+2+9
12=1+3+8
12=1+4+7
12=1+5+6
12=2+2+8
12=2+3+7
12=2+4+6
12=2+5+5
12=3+3+6
12=3+4+5
12=4+4+4

Multiplying the 3 members of each partitions results in 12 distinct numbers: 10,18,...60,64.

On the other hand the same treatment applied to number 13 produces a pair of equal results: 13=1+6+6=2+2+9 and 1*6*6=2*2*9=36 (a well known problem of children's ages).

Find the smallest number which has 3 distinct partitions into 3 parts, each of them with the same product.

Bonus: list all numbers below 1000 boasting this feature.

 No Solution Yet Submitted by Ady TZIDON No Rating Comments: ( Back to comment list | You must be logged in to post comments.) re: Answer to the bonus. | Comment 5 of 10 | I admit being   being surprised by your findings ; I  knew only about 39 & 53 and therefore estimated the quantity  will be well below 100.

So:   39 is the smallest integer  having this  feature (proven!). and 102 - the largest integer not having it.(Charlie's conjecture!)

Ch, i recommend  checking for  a slightly higher bound (say 2000) and then submitting the list to OEIS.

Enjoy the bonus!

Edited on November 22, 2018, 8:29 am
 Posted by Ady TZIDON on 2018-11-22 08:26:36 Please log in:

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