1. 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:

$$
\text { 20, _, , , , , , } 16 \text {, }
$$

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.