Pregunta: Dados los siguientes grupos de fracciones, decir de cada fracción si es irreductible o no:1) ${5}/{35}$  y ${4}/{2}$  y ${45}/{5}$  
2) ${2}/{9}$  y ${6}/{3}$  y ${56}/{35}$  
3) ${20}/{36}$  y ${24}/{27}$  y ${3}/{3}$  
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