Question

By which number 769 be multhly so it be a perfect
Square​

Answer 1

The answer is 9.

Explanation: Step 1:

What is the last number of 769? It is this number: 769. The answer is 9. Is 9 in the list of numbers that are never perfect squares (2, 3, 7 or 8)?

Answer: NO, 9 is not in the list of numbers that are never perfect squares. Let's continue to the next step.

Step 2:

We now need to obtain the digital root of the number. Here's how you do it:

Split the number up and add each digit together:

7 + 6 + 9 = 22

If the answer is more than one digit, you would add each digit of the answer together again:

2 + 2 = 4

What is the digital root of number 769?

Answer: 4

Step 3:

So now we know the digital root of 769 is 4. Is 4 in the list of digital roots that are always a square root (1, 4, 7 or 9)?

Answer: YES, 4 is in the list of digital roots that are always perfect squares. We can conclude that 769 could be a perfect square!

Factoring

OK, so now we know that 769 could be a perfect square. We have to find the factors of the number to be sure.

Here are all of the factors of 769:

1 x 769

We're looking for a factor combination with equal numbers for X and Y (like 3x3) above. Notice there isn't a equal factor combination, that when multiplied together, produce the number 769. That means 769 is NOT a perfect square.