Question

21. How many integers between 999 and 9999 either begin or end with 37​

Answer 1

Answer:

For the two-digit numbers, only 33 begins and ends in 3.

And for three digits numbers the possible integers are 303,313,323,333...........393.

We can see that we have 10 three digits integers which begins and ends with 3 and 1 two digits integer which begins and ends with 3.

So, that the total number of integers which begins and ends with 3 between 10 and 500 are =10+1=11

Answer 2

Step-by-step explanation:

The answer is there are 1900 integers between 999 & 9999 that begin or end with a three.