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GCD & LCMmedium
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Find gcd(F6,F5)\text{gcd}(F_6, F_5)gcd(F6​,F5​) where FnF_nFn​ is the nnn-th Fibonacci number (F1=1,F2=1,F3=2,F4=3,F5=5,F6=8F_1=1, F_2=1, F_3=2, F_4=3, F_5=5, F_6=8F1​=1,F2​=1,F3​=2,F4​=3,F5​=5,F6​=8).