docs: make hints less explicit to encourage problem-solving (#576)

Author: eyad-alkhalidy

06_repeatString/README.md

@@ -14,6 +14,6 @@ Use loops to implement `repeatString` rather than using the builtin `String.prot
 
 ## Hints
 
-- Take note of the above function call- how exactly is it being called?
+- What inputs does the function need to achieve its goal?
 
-- Create a variable to hold the string you're going to return, create a loop that repeats the given number of times and add the given string to the result on each loop.
+- How can you iteratively build up the final string, using one of the inputs to control the repetition?

09_sumAll/README.md

@@ -9,9 +9,6 @@ sumAll(1, 4) // returns the sum of 1 + 2 + 3 + 4 which is 10
 
 ## Hints
 
-Think about how you would do this on pen and paper and then how you might translate that process into code:
-- make sure you pay attention to the function parameters
-- create a variable to hold the final sum
-- loop through the given numbers ([link](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration))
-- on each iteration add the number to the sum
-- return the sum after finishing the loop
+- How will you ensure you're summing all integers within the correct range, no matter the order of the inputs?
+
+- Think about your sum's starting value. Then, how can you make sure every single number from the smaller input to the larger one (including both) gets added to it?