Update readme.md

Author: Taras

lambda-basics/readme.md

@@ -1,3 +1,10 @@
 # <img src="https://raw.githubusercontent.com/bobocode-projects/resources/master/image/logo_transparent_background.png" height=50/> Lambdas tutorial
 
 This is the tutorial on lambdas, method reference, and functional interfaces. 
+### Pre-conditions
+You're suppose to be familiar with OOP, have basic knowladge of JDK, and be able to write Java code. 
+### Related exercises
+* [Math fucntions factory](https://github.com/bobocode-projects/java-8-exercises/tree/master/math-functions-factory)
+### See also
+* [Tutorial on Optional](https://github.com/bobocode-projects/java-8-tutorial/tree/master/optional)
+* [Tutorial on Stream API](https://github.com/bobocode-projects/java-8-tutorial/tree/master/stream-api)