How do you get $ 749 $ rounded to the nearest hundred ?

Hint: We should have the knowledge of rounding off to get the correct answer to this question. As we know that rounding off is kind of estimating the number by replacing a value with an approximate value that has simpler, shorter and explicit representation. To estimate any number to the nearest hundred that means for example if we have, $ 162 $ it's nearest hundred will be $ 200 $ .

Complete step by step solution:
Here we have the number $ 749 $ .To round off this number we first have to find the place of the whole number and look at the digit, if the digit is less than $ 5 $ then we just leave it but the numbers right to it , we will turn them all into zero. And if the digit is greater than $ 5 $ then we will add one to the rounding number and then turn all the digits into zero right next to it.
Here in the given number the digit is $ 7 $ , greater than $ 5 $ . So we will add one to it and we get $ 8 $ . Now we will turn $ 49 $ into $ 00 $ .
Hence $ 749 $ is rounded off to $ 800 $ to its nearest hundred.
So, the correct answer is “800”.

Note: We should keep in mind the rules of rounding and its steps before solving this kind of question. The steps of rounding off the are to find the place value digit and then look for the digit next to it. If the digit is less than $ 5 $ , then we keep rounding digit the same and turn the digit next to zero. If the digit is greater than or equal to $ 5 $ then we will add $ 1 $ to the rounding digit and then turn the values into zero.