Well, I can't explain how to solve but the answer is (2,8)
Answer: number 3 is 10 and number 4 is 3.16
Step-by-step explanation:
its just finding the square roots and doing the operation that follows
6×5=30. the sum of the five numbers is 30. then just do 30-7-8-5-2=8. 8 is the number on the bottom card.