How many five digit numbers are there

Let us see how a 5-digit number can be decomposed into its place values. Let us continue with the same number Now, how would the 5 place values change if we interchanged some of the digits? Let us change the number 20, to another 5-digit number having the same numbers with interchanged digits, like, 32, The change in place value of the same 5 digits shows the following results:.

We saw the use of commas in four-digit numbers , and the position of the comma was to the left of the hundreds place. In a 5-digit number too, only one comma is to be used, and it is to be applied to the left of the hundreds place. For example, the 5-digit numbers and can be better expressed as 32, and 20, which helps in reading the numbers correctly.

As we said earlier, is not a five-digit number but a four-digit number A five-digit number cannot have 0 as the first digit on the left, which is the ten thousand place. Overall, every one of the 5 places of a 5-digit number can be filled up in ten ways, because it can have 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9.

So each of the five places can be similarly filled up in ten ways. Out of these 1,00, ways of forming a 5-digit number, we need to take out all the possibilities which have zero in the first position on the left or the ten thousand place.

When there is zero in the first place, the next position Thousands can be filled up in ten ways, as can the Hundreds, Tens, and Units places. If we subtract these 10, ways from the overall 1,00, ways, we are left with 90, Therefore, there are 90, unique 5-digit numbers possible.

Here is a list of some important notes related to numbers up to 5-digits. These are helpful while we solve questions related to this topic. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.

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The Circle. Recognition of Solids. Perimeter and Area of Plane Figures. Mean and Median. Exercise 4 A. Exercise 4 B. So the image form is real and it is also a diminished image as you can see the object is much bigger in size rather than the image so the image is diminished what type of mirror is used here again concave therefore the answer to the third one will also be concave mirror let's have a look at the fourth one now so a virtual and a diminished image now this case the image the b case if you see image was virtual but it was enlarged this time we need a diminished image so Let's have a mirror.

Therefore, it's a virtual image, and it is a diminished image so a virtual and diminished image is formed in this case which is d now what type of mirror this is it's a convex mirror this time because it's bulging out and it's a a diverging mirror so the answer to this is convex mirror I hope you understood this if you have any further questions, please post your comments below Also, if you like this video, please don't Forgot to subscribe to Lido channel for more such videos Thank you.

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