mathematical puzzle with moveable discs: crossword clues

Matching Answer
Confidence
LPS
60%
HANOI
60%
POGS
43%
DEMOS
43%
LOCI
20%
RATIO
20%
COSET
20%
SETS
20%
QED
20%
PIS
20%
e.g. Greek Cheese
e.g. O?D (Use ? for unknown letters)