Question
Without doing any calculation, find the number which are surely not perfect squares.
408
408
✓
Answer
We know that the numbers end with $2,3,7$ or 8 , can never be a perfect square.
In a number 408, end digit is 8 , which is one of $2,3,7$ or 8 .
So, it never be a perfect square.
In a number 408, end digit is 8 , which is one of $2,3,7$ or 8 .
So, it never be a perfect square.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
$5^0$= ___________.
→Verify $-(-x) = x$ for:
$\text{x}=\frac{13}{-15}$
→$\text{x}=\frac{13}{-15}$
If $A \times 3 = 1A,$ then $A =$ ________.
→There are countless rational numbers between $\frac{5}{6}$ and $\frac{8}{9}.$
→ Fill in the blanks:
The reciprocal of a negative rational number is ____________.
The reciprocal of a negative rational number is ____________.
The following pictorial representation of data is a histogram.
The difference between the upper and lower limit of a class interval is called the _____ of the class interval.
Count the number of cubes in the given shapes.
$a^2- b^2= (a + b )$ __________.
→ Which of the following statements are true for a rectangle?
Its diagonals are perpendicular and bisect each other.
Its diagonals are perpendicular and bisect each other.