What is the square root of 784?
-Write down the factors of
- For example, if you see
- At this time you verify one by multiplying
The square root of
It is beneficial to be able to estimate, or calculate exactly the square root of any number when a calculator is not present.
For this example, we can start an estimation limit high and low as follows:
If we raise the lower limit to
Now our range is
But the squared number ends in
So the Square root of
If you still have doubts use a prime factor tree.
You are looking for squared values that are factors of 784. Use the lowest value prime numbers that you can. Good idea to commit some of them to memory. It will pay off in the end. You can find lists of them all over the internet.
From the factor tree we have: