# Maths: Square and Square Roots

1. A number is called a perfect square if it is expressed as the square of a number.
2. E.g. 1, 4, 9, 16, 25, … are called perfect squares (1×1 = 1, 2×2 = 4, 3 x 3 = 9…)

3. In square numbers, the digits at the unit’s place are always 0, 1, 4, 5, 6 or 9.
4. The numbers having 2, 3, 7 or 8 at its units’ place are not perfect square numbers

EXAMPLE: Which one of the following number is a perfect square:
a) 622
b) 393
c) 5778
d) 625

5. If a number ends with odd number of zeros then it is not a perfect square.

EXAMPLE: Check which of the following is a not a perfect square.
a) 81000
b) 8100
c) 900
d) 6250000

EXAMPLE: Which of the following perfect square numbers,is the square of an odd number?
289, 400, 900, 1600
a) 289
b) 400
c) 900
d) 1600

EXAMPLE: Which of the following perfect square numbers,is the square of a even number?
361, 625, 4096, 65536
a) 361
b) 625
c) 4096
d) 260

### Polity Quiz For CTET Exam : 12th Feb 2020 For Local Government

12th Feb 2020 3 min read

### CTET 2020 Hindi Grammar Questions: 31st January 2020

31st Jan 2020 2 min read

### DSSSB 2020 Hindi Grammar Questions: 30th January 2020

30th Jan 2020 2 min read

### HISTORY QUIZ

1st Aug 2014 3 min read

### Important History Years

31st Jul 2014 < 1 min read

### CHILD DEVELOPMENT AND PEDAGOGY QUIZ

29th Jul 2014 2 min read

• Live Class
• Video Course
• Test Series

• Live Class
• Video Course
• Test Series