# 1 to 20 Square Value [PDF Download]

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## 1 to 20 Square

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. Memorizing the values of these squares will help the students to simplify time-consuming equations quickly. The square of a number in exponential form is expressed as (x)2.

## 1 to 20 Square Chart

Also Check :- 1 to 30 Cube PDF Download

## 1 to 20 Square of a Negative Number

The Square of a number can be found by multiplying the number by itself. The product of two negative numbers is always positive. If we find the square of a negative number, say -x, where x > 0, then (-x) × (-x) = x2. Therefore, the square of a negative number is always positive.

a) 144

b) 256

c) 121

d) 361

Answer : (d) 361

a) 121

b) 144

c) 64

d) 169

Answer : (b) 144

a) 80

b) 64

c) 88

d) 49

Answer : (b) 64

a) 144

b) 256

c) 324

d) 361

Answer : (c) 324

a) 256

b) 169

c) 8

d) 64

Answer : (a) 256

a) 7

b) 196

c) 256

d) 121

Answer : (b) 196

a) 256

b) 144

c) 121

d) -121

Answer : (c) 121

## Solved Examples of Square

#### Example 1: Find the area of a square window whose side length is 12 inches ?

Solution :

Area of Square window (A) = (side)2

i.e. A = (12)2= 144

Therefore, the area of the square window is 144 inches2.

#### Example 2: If a circular outlet window has a radius of 20 cm, find the area of the circular window ?

Solution :

Area of circular window (A) = π(radius)2

i.e. A = π(20)2 = 1256 cm2.

Therefore, the area of the circular window is 1256 cm2.

#### Example 3: What is the square of -11 ?

Solution :

Square of -11 = (-11)2 = -11×-11 = 121.

Example 4: Evaluate 42+72+92+52.

Solution :

=(4×4)+(7×7)+(9×9)+(5×5)

=16 + 49 + 81 + 25

= 171 Ans

## FAQs

### What is the square of 1 to 20?

Ans: Square numbers from 1 to 25 are 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361 and 400.

Ans: 400

Ans: 289

Ans: 4

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