Find the joyful spring letters

The task used is called N-Back. N-back is a memory test where n refers on how many previous stimuli must be remembered. A lot of people report numerous benefits after playing the "Step Back", such as: - easier get a hold of a discussion - better verbal fluency - faster reading with better understanding - better concentration and focus - better dream recalling - improvements in piano playing All these benefits (and there are many others) were taken from the real peoples' feedbacks on the N-Back task training.

Prequel to the advanced to Infinite mathMagic: all you have to do is to add, subtract, multiply the given two numbers, type the correct answer to get next question

It is summer and you go shopping at the market. You would like to try a different recipe, a different recipe today. Our advice is to cook a vegetable soup. First of all, a vegetable soup is fresh, is healthy and it contains a lot of vitamin. Here you have got the original recipe, have fun!

teaches you how to assemble a PC