OBS. 5.—­A cardinal numeral denotes the whole number, but the corresponding ordinal denotes only the last one of that number, or, at the beginning of a series, the first of several or many.  Thus:  “One denotes simply the number one, without any regard to more; but first has respect to more, and so denotes only the first one of a greater number; and two means the number two completely; but second, the last one of two:  and so of all the rest.”—­Burn’s Gram., p. 54.  A cardinal number answers to the question, “How many?” An ordinal number answers to the question, “Which one?” or, “What one?” All the ordinal numbers, except first, second, third, and the compounds of these, as twenty-first, twenty-second, twenty-third, are formed directly from the cardinal numbers by means of the termination th.  And as the primitives, in this case, are many of them either compound words, or phrases consisting of several words, it is to be observed, that the addition is made to the last term only.  That is, of every compound ordinal number, the last term only is ordinal in form.  Thus we say, forty-ninth, and not fortieth-ninth; nor could the meaning of the phrase, four hundred and fiftieth, be expressed by saying, fourth hundredth and fiftieth; for this, if it means any thing, speaks of three different numbers.

OBS. 6.—­Some of the numerals are often used as nouns; and, as such, are regularly declined:  as, Ones, twoes, threes, fours, fives, &c.  So, Fifths, sixths, sevenths, eighths, ninths, tenths, &c.  “The seventy’s translation.”—­Wilson’s Hebrew Gram., p. 32.  “I will not do it for forty’s sake.”—­Gen., xviii, 29.  “I will not destroy it for twenty’s sake.”—­Ib., ver. 31.  “For ten’s sake.”—­Ib., ver. 32.  “They sat down in ranks, by hundreds, and by fifties.”—­Mark, vi, 40.  “There are millions of truths that a man is not concerned to know.”—­Locke.  With the compound numerals, such a construction is less common; yet the denominator of a fraction may be a number of this sort:  as, seven twenty-fifths.  And here it may be observed, that, in stead of the ancient phraseology, as in 1 Chron., xxiv, 17th, “The one and twentieth to Jachin, the two and twentieth to Gamul, the three and twentieth to Delaiah, the four and twentieth to Maaziah,” we now generally say, the twenty-first, the twenty-second, &c.; using the hyphen in all compounds till we arrive at one hundred, or one hundredth, and then first introducing the word and; as, one hundred and one, or one hundred and first, &c.