ultimate hard puzzles - join
This group is intended to be the most powerfull puzzle collection group in the world. Any trivial puzzle or any subject except puzzles will be erased.
Low activity, 55 members, restricted

indian maths puzzles to puzzle you - join
This group deals with some of the wounders of mathematics from Indian famous mathematicians like Ramanujam and some of their contributions to the field of MATHEMATICS which is the science of the sciences.
Low activity, 85 members, restricted

fun_with_numbers - join
A GROUP FOR MENTAL MATH OR QUICK MATH SO THAT ANYONE FAMILIAR WITH NUMBERS CAN CALCULATE ON FINGER TIPS.
Low activity, 144 members, restricted