Two significant figures (8,9).
2 significant figures
There are 2 or 3 significant figures. It could be 894° rounded to 2 significant figures; It could be 889.6° rounded to 3 significant figures.
2 of them.
Those four numbers are all whole numbers.
890
890 is evenly divisible by these numbers: 1 2 5 10 89 178 445 and 890.
All multiples of 890, which is an infinite number, including 890, 1780, 2670, 3560, 4450 . . .
Two. There is no decimal point, so the zero is just a placeholder.
900 of them.
There are 89 tens in 890.
231.57 has five significant figures/numbers. All the numbers in 231.57 are significant.
There are a total of 890 numbers between 110 and 1000 inclusive - 445 of these are odd, and 445 are even.