what is the answer to 5.6,5.7,__,6.2,6.6,__,7.7,__,__
5.6 (+0.1) → 5.7 (+0.2) → 5.9 (+0.3) → 6.2 (+0.4) → 6.6 (+0.5) → 7.1 (+0.6) → 7.7 (+0.7) → 8.4 (+0.8) → 9.2
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