1 To 20 Square , Square Chart, Square Value, Square Number, Square Value List, Square PDF Download, Square Online Test, Square Trick. When we multiply a number twice by itself, then the product we get is the square of that number. The value of squares 1 to 20 ranges from 1 to 400. The mathematics value of squares from 1 – 20 covers from 1 to 400. Determining these values will assist students to solve time-taking questions immediately The square root 1 to 20 in the exponential form is shown as x ki power of 2. To memorise and apply the squares 1 to 30 easily, you can print out the table below that lists each square value. Revising this table with each square 1 to 30 for 3 to 4 days will make you fluent in recalling these squares , much like how you got comfortable with the multiplication tables of individual numbers. Square 1 to 20 – Even Numbers The table below shows the values of squares 1 to 20 for even numbers.