Table of Contents
- 1 How many squares have 7 as their units digit?
- 2 What is the difference between the square of the tens digit and the square of the units?
- 3 Which of the following digits Cannot be at ones place of a perfect square?
- 4 What is the unit digit of the tens digit in decimal?
- 5 What is the tens place of C in square root of 7?
How many squares have 7 as their units digit?
This shows that the units digit of a square can only be 0, 1, 4, 5, 6 or 9. In particular, there are are no squares which have 7 as their units digit.
Can a perfect square have the digit 7 in the ones place Why?
A perfect square number can never have the digit at the units place.
What is the difference between the square of the tens digit and the square of the units?
– If unit digit of a perfect square is 4 then ten’s digit has to be Even. E.g. 64, 144, 484 all are Perfect Square having unit digit 4 and tens digit is even. E.g. 25, 225, 625,1225 all are Perfect Square having unit digit 5 and tens digit is 2. – If unit digit of a perfect square is 6 then ten’s digit has to be Odd.
Can we have a square number with unit digit 8?
The unit digit of the square of a number having digit 8 as unit’s place is 4. ∴ Unit digit of the square of number 52698 is equal to 4. viii. The unit digit of the square of a number having digit 0 as unit’s place is 01.
Which of the following digits Cannot be at ones place of a perfect square?
From the perfect squares found of all the numbers, it is obtained that 2, 3, 7, and 8 are the number that can never exist on the unit place of a Perfect Square.
What is the tens digit of 7 2011?
4
The tens place of 7^{2011} is a 4.
What is the unit digit of the tens digit in decimal?
Since a number that has a 7’s digit in the tens-place, it would give a remainder of 10-19 against 20. The only squares here is 16, so the unit digit must be six. So if the tens digit in decimal is odd, the only digit that one can find is 76. This is the result of squares of 24, 26, 74 or 76 only. So the unit digit must be ‘6’.
How to find unit digit of a square?
Here we are going to see how to find unit digit of a squares. To obtain square of a number, we have to multiply that number by itself, or multiply the same number two times. Without doing actual multiplication, we may find the unit digit of the square of a number.For that, first we have to consider the unit digit of the given number.
What is the tens place of C in square root of 7?
Sq (9)=81. Since 7 is an odd number and 20bc will always have even number at tens place, ‘c’ should be odd. Not only this, tens place of sq (c) should also be odd. Thus, c can only be 4 or 6.
What is the largest and smallest 3-digit number in the table?
Using the digits 7, 3, and 6, the largest number is 763 (digits in descending order) and the smallest number is 367 (digits in ascending order). Using the digits 4, 0, and 8, the largest number will be 840 but the smallest 3-digit number is 408 and not 048. Download FREE Study Materials Download FREE Concept E-book