Neither 4182

Hanka gave Simon a riddle: guess a pair of numbers whose GCD is 7, and LCM is 90. Katy wanted Šimon to guess such a pair for which GCD is 7, and LCM is 91. Which riddle could Šimon guess?
A: Katy
B: Hankina ​
​C: neither
D: Both

Correct answer:

a =  7
b =  91

Step-by-step explanation:

7=1 7 90=2   3   3   5 91=7   13 a=7
b=91 7 ...  prime number 91=713 LCM(7,91)=713=91  x=LCM(7,91)=91 7 ...  prime number 91=713 GCD(7,91)=7  y=GCD(7,91)=7 b=91



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