Mathematics
NULL
Medium
Question
Which three-letter code does not use the −1, +3 letter steps?
A
GFI
B
QOR
✓ Official correct answer
C
LKN
D
YXA
Community credibility
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A
GFI
No member explanations yet for this option.
B
QOR
No member explanations yet for this option.
C
LKN
No member explanations yet for this option.
D
YXA
No member explanations yet for this option.
Explanation
GFI, LKN and YXA each go −1 then +3; QOR uses a different first step.