19.3.2 Consecutive Numerical Expressions.

When 2 numbers appear consecutively in a sentence, either reword the sentence or spell out 1 of the numbers for clarity.Study participants were provided twenty 5-mL syringes. Avoid: In the cohort of 1500, 690 were men.Better: In the cohort of fifteen hundred, 690 were men.Or: In the cohort, 690 of the 1500 individuals were men. The envelope contained 3 copies of the manuscript and one 3.5-in diskette.However, numerals may be listed consecutively if they refer to items in an array. As always, clarity and common sense should guide usage.The life expectancy of groups 1, 2, and 3 was 69, 83, ...Less