Name: John and Norman
Question: All Derfs are Enajs. One-third of all Enajs are Derfs. Half of all Sivads are Enajs. One Sivad is a Derf. Eight Sivads are Enajs. The number of Enajs is 90. How many Enajs are neither Derf nor Sivad?Hi,
I would do this with a Venn diagram. Draw three circles, one for the Derfs one for the Enajs and one for the Sivads. Label them D, E and S. Since "All Derfs are Enajs" the D circle is inside the E circle
Now look for clues that have specific numbers.