Round off 329 to the nearest ten.
When we round off a number to the nearest 10, we find the multiples of 10 that are just before and after the number and check which is closest to the number.
If the digit in the ones place is 5 or more, it is rounded off to the higher value.
Here, the number 329 is closer to 330 (than 325). So, it is rounded off to 330.