2. In a row, there are 8 numbers such that the sum of any three consecutive numbers equals 100. The first and last numbers of these eight are known. Fill in the six empty places:

20, _,_,_,_,_, 16 .

ANSWER: $20,16,64,20,16,64,20,16$
Solution: It follows from the condition that the sequence of numbers is periodic with a period of 3.