Logic: The Spiders

Rafael will also give 50 tokens to the first person who posts the correct solution to the following problem:

One spider that live in the forest is trying to spin a really big net from one three to another. The first day the spider make one little square of the net. The work he do one day is the next double, and so on the spider will spend 30 days making the net. How many days will the work last if he call her sister in order to help her?

P.S. The sister will work at the same rythm. :doubt: =D>

[Benny]

29 days

Just one spider who doubles their work everyday and completes in 30 days will have done half the total work in 29 days. The other half of the work is done by the other spider in 29 days. Working together they complete the work in 29 days.

Well done Benny

You should have recieved your 100 tokens

Congratulations!
Rafael

[Benny]

Originally Posted by rafael

Rafael will also give 50 tokens to the first person who posts the correct solution to the following problem:

Originally Posted by rafael

You should have recieved your 100 tokens

I didn't seem to get 50 or 100 tokens for this. I only got 100 for solving the coin bag puzzle! Not that I'm being greedy