Mon 23/11/15
1) Riddler's riddles. Geno got one but the other is unanswered. :) Thanks Geno and Ridler :)
http://web2.0calc.com/questions/riddles-for-ages
2) Fun facts continued Thanks Riddler
http://web2.0calc.com/questions/fun-facts#r3
3) Problem simultaneous equations with a challenge question added.
Thanks Geno and guest.
http://web2.0calc.com/questions/in-pta-fundraising-activity-couples-who-came-were-charged-400-however-if-only-one-parent-came-he-was-charged-250-00#r3
4) 2 very different answers for a half life question. Thanks Geno3141 and guest. :D
http://web2.0calc.com/questions/chemistry_8658
5) Logistics problem Thanks CPhill and jc
http://web2.0calc.com/questions/logistic-model-help-thank-you
6) Singing crickets and modular arithmetic.
http://web2.0calc.com/questions/math-problem-sum