Significant Figures Quiz

Write 236 correct to one significant figure.

Answer explanation

The number 236 written to one significant figure is 200, as the first non-zero digit is in the hundreds place. The zero placeholders are not considered significant figures.

Write 74.86 correct to 1 significant figure.

Answer explanation

When rounding to 1 significant figure, the digit in the tenths place (8) remains the same, and all other digits are replaced with zeros. Therefore, 74.86 rounded to 1 significant figure is 70.

Write 6793 correct to one significant figure.

Answer explanation

6793 correct to one significant figure is 7000, as the first non-zero digit is in the thousands place.

Write 24514 correct to one significant figure.

Answer explanation

The correct way to write 24514 to one significant figure is 20000. Since the first digit is 2, we round down to the nearest power of 10.

Write 3540 correct to 2 significant figures.

Answer explanation

3540 correct to 2 significant figures is 3500 since the first two digits are significant and the third digit is not significant enough to round up.

Write 17635 correct to two significant figures.

Answer explanation

When rounding 17635 to two significant figures, the result is 18000 since the first two digits are 1 and 7, and the third digit is 6 which rounds up.

Write 506452 correct to two significant figures.

Answer explanation

506452 correct to two significant figures is 510000, as the digit after the second significant figure (0) is 6, which rounds the number up.

Write 506452 correct to three significant figures.

Answer explanation

506,000 is the number rounded to three significant figures since the digit after the third significant figure (4) is less than 5.

Write 0.0683 correct to 1 significant figure.

Answer explanation

When writing 0.0683 to 1 significant figure, the first non-zero digit is 6, so the answer is 0.1.

Write 0.1826 correct to 2 significant figures.

Answer explanation

When rounding 0.1826 to 2 significant figures, the result is 0.18. The digit after the last significant figure (8) is less than 5, so it remains the same.