`{:("Across","Down"),(3." the equality of ratios" , 1. " Does ratio have units" ),(6. "b and c in a:b :: c:d", 2. "a in a :b"),(9."b in a:b" , 4."comparison of similar quantities by divison"),(10."The ratios 4 :6 and 6:9 are", 5."Are 12.15.20 and 25 in proportion?"),(11."a:b is in its lowest terms, the HCF of a and b is" , 7."a and d in a: b::c:d is"),(,8. "Two-fifth of 250is"):}`

Explanation

`{:("Across", "Down"),(3."Porportion",1.No),(6."Means",2. "Antecedent"),(9."Consequent",4."Ratio"),(10."Equal",5."yes"),(11."one",7."Extremes"),(,"8.Hundred"):}`