One significant figure.
The are 78498 prime numbers smaller than 1 million.
Because 10.00400 is 10.004, this has five significant digits (numbers).
Four significant figures.
Three significant figures.
3 significant figures.
In 1000000 there is one significant figure.
1000000) has 1 significant figure and a least significant decimal of 6.
If you count from 1 to 1000000 you count 1000000 numbers so there are 1000000 numbers in 1000000
78498
That's one number.
7 numbers in one million 1000000
That's an infinite list.
231.57 has five significant figures/numbers. All the numbers in 231.57 are significant.
About half the total sum listed.
Answer is 1 Sig Fig. You count the "1" as a Significant Figure, and the trailing zeroes are not considered Sig Figs.
The figure 18.03 has a total of four significant numbers
2*500000=1000000