Together I am four and five. Apart, am I four or five? Often I am written one or one. Confused, I may be payments for a bard, antique hearing-aids, the price of gas, brightly-burning fat, a damned man's ogle, guidelines for heroism, a tempting meal, a whimsical shine, a predictor of problems, a prenatal jape, or I may tamper with explosives. What kind of question is this? Programs and pop-quizzes frequently ask.
"four and five" refers to the number of vowels and consonants in the answer. "four or five" refers to the number of letters in each of the two words. The "confused" clues all refer to anagrams of the main answer.