Advertisements
Advertisements
Question
Without doing any calculation, find the number which are surely not perfect squares.
- 153
- 257
- 408
- 441
Advertisements
Solution
The perfect squares of a number can end with any of the digits 0, 1, 4, 5, 6, or 9 at the unit's place. Also, a perfect square will end with an even number of zeroes, if any.
- Since the number 153 has its unit’s place digit as 3, it is not a perfect square.
- Since the number 257 has its unit’s place digit as 7, it is not a perfect square.
- Since the number 408 has its unit’s place digit as 8, it is not a perfect square.
- Since the number 441 has its unit’s place digit as 1, it is a perfect square.
APPEARS IN
RELATED QUESTIONS
Find the square root of:
\[\frac{324}{841}\]
Find the square root of:
\[3\frac{334}{3025}\]
Find the square root of `96 1/25`.
Evaluate: `sqrt(248 + sqrt(52 + sqrt(144)`
Find the square root of the following correct to two decimal place: `3 4/5`
Find the least number which must be added to 1205 so that the resulting number is a perfect square.
Evaluate: 852 – 842
State, whether the square of the following number is even or odd?
54
State, whether the square of the following number is even or odd?
76
If a number has 5 or 6 digits in it, then its square root will have ___________ digits
