I (One): Most animals only have one nose and one mouth. Animals like goats, cows and sheep have only one tail. When any number is multiplied by one, it stays the same (i.e. 15 x 1 = 15).
2 (Two): Humans have two eyes, two ears, two arms, two legs and two feet. A pair = two, and a couple = two. Bi = 2 as in biannual, biceps, bicycle, bikini, bilingual, binocular, biplane and bisect. Strangely: 2 + 2 = 2 x 2.
3 (Three): ‘Tri’ means 3 as in triangles, tricycle, trinity, trio, triple jump, triplets and tripod.
4 (Four): A square has for sides. There are four legs on chairs, tables and many mammals. Quad = 4 as in quadrangle, quadrilateral, quadruped, quadruplet and quadruplicate. There are four cardinal points of the compass.
5 (Five): The human hand has fingers and the foot has five toes. Many flowers have five petals. There are five points on a star, and five sides on a pentagon.
6 (Six): There are six points on a star made with two equilateral triangles. Six is a perfect number as its factors add up to 6 (1 + 2 + 3 = 6). A hexagon has six sides. An insect has six legs.
7 (Seven): Seven has religious and mystic associations. There are seven days in a week. There are seven deadly sins, seven marvels of the world and seven oceans.
8 (Eight): Oct = 8 as in octagon, octahedron, octave, October (which used to be the 8th month!), Octopus/spiders have eight legs.
9 (Nine): A cat has nine lives. Nine is a square number (3 x 3 = 9).
10 (Ten): Ten is the number base for our Decimal System. Dec = 10 as in decade, decagon, decahedron, decilitre, decathlon, December, decilitre, decimal, decimal point, decimate and decimetre. We have ten fingers. The sum of first four numbers equals ten (1 + 2 + 3 + 4 = 10).
