Whole Numbers and Cardinal Numbers: 10 to 99

Numbers from 11 through 19 are:

11 eleventh

Lavender Box Teal Box DodgerBlue Box MediumVioletRed Box Fuchsia Box GreenYellow Box Olive Box ForestGreen Box DarkCyan Box Pink Box Sienna Box

12 twelth

Sienna Box Violet Box Chocolate Box Gold Box RosyBrown Box DarkKhaki Box Aqua Box Yellow Box LawnGreen Box Empty Box BlueViolet Box Turquoise Box

13 thirteenth

Turquoise Box Indigo Box MediumOrchid Box YellowGreen Box Goldenrod Box DarkTurquoise Box DarkGreen Box Blue Box SeaGreen Box DarkViolet Box OliveDrab Box MediumSeaGreen Box Orchid Box

14 fourteenth

Orchid Box DarkMagenta Box MediumSpringGreen Box DarkOrchid Box DeepSkyBlue Box MediumPurple Box HotPink Box Maroon Box MediumSlateBlue Box Magenta Box PowderBlue Box DarkSlateBlue Box Coral Box Aquamarine Box

15 fifteenth

Plum Box DeepPink Box DarkBlue Box SandyBrown Box DarkGoldenrod Box SlateBlue Box MediumTurquoise Box MediumBlue Box SkyBlue Box Peru Box Wheat Box BurlyWood Box LimeGreen Box DarkOrange Box Green Box

16 sixteenth

CadetBlue Box MidnightBlue Box Navy Box Chartreuse Box CornflowerBlue Box Thistle Box SaddleBrown Box Purple Box Brown Box SteelBlue Box RoyalBlue Box Cyan Box Tan Box Tan Box Tan Box Tan Box

17 seventeenth

Lavender Box Teal Box DodgerBlue Box MediumVioletRed Box Fuchsia Box GreenYellow Box Olive Box ForestGreen Box DarkCyan Box Pink Box Sienna Box Violet Box Chocolate Box Gold Box RosyBrown Box DarkKhaki Box Aqua Box

18 eighteenth

LawnGreen Box Empty Box BlueViolet Box Turquoise Box Indigo Box MediumOrchid Box YellowGreen Box Goldenrod Box DarkTurquoise Box DarkGreen Box Blue Box SeaGreen Box DarkViolet Box OliveDrab Box MediumSeaGreen Box Orchid Box DarkMagenta Box MediumSpringGreen Box

19 nineteenth

DarkMagenta Box MediumSpringGreen Box DarkOrchid Box DeepSkyBlue Box MediumPurple Box HotPink Box Maroon Box MediumSlateBlue Box Magenta Box PowderBlue Box DarkSlateBlue Box Coral Box Aquamarine Box Khaki Box DarkSeaGreen Box Plum Box DeepPink Box DarkBlue Box SandyBrown Box

Numbers from 20 through 29 are:

20 twentieth

SlateBlue Box MediumTurquoise Box MediumBlue Box SkyBlue Box Peru Box Wheat Box BurlyWood Box LimeGreen Box DarkOrange Box Green Box MediumAquamarine Box CadetBlue Box MidnightBlue Box Navy Box Chartreuse Box CornflowerBlue Box Thistle Box SaddleBrown Box Purple Box Brown Box

21 twenty-first
22 twenty-second
23 twenty-third
24 twenty-forth
25 twenty-fifth
26 twenty-sixth
27 twenty-seventh
28 twenty-eighth
29 twenty-ninth

Numbers from 30 through 90, counting by tens, are:

30 thirtieth
40 fortieth
50 fiftieth
60 sixtieth
70 seventieth
80 eightieth
90 ninetieth

We note that fourth is written with a u but fortieth is written without a u.

We write 31 as thirty-first. We write 85 as eighty-fifth.

Two-digit numbers are called tens.

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