Do not repeat an article before each adjective of a series when all modify the same noun. Say, A red, white and blue flag. If you mean three flags, say, A red, a white, and a blue flag.
Do not write a or an after sort of and kind of. Make it: He is the right sort of man for mayor.
The definite article is used too often when it might better be omitted, as in this sentence: The study of the dictionary is helpful. Write it: Study of the dictionary.
NUMBERS
The general rule on The News is that all numbers above nine shall be written in figures, and that all numbers below 10 shall be spelled out. There are, of course, many exceptions to this rule. Figures are always used for degrees of latitude and longitude, degrees of temperature, per cent, prices, racing time, scores, definite sums of money, time, votes, dates (as Sept. 27), ages, street numbers and tabulated statistics.
Spell out indefinite figures, as about a dollar's worth.
Use Roman numerals in writing of kings, as George V, and then without a period. Do not use Roman numerals in designating centuries. Write it fourteenth century, not XIVth century.
Write Monday at 8 a. m., not at 8 o'clock on Monday morning.
Spell out such expressions as the early seventies.