Limits of accuracy

Maths

Rounding and Estimating

What is the upper bound of 21 cm rounded to the nearest centimetre?

The population of Yorkshire is 5 400 000 to two significant figures, what is the greatest possible number of people who live in Yorkshire?

What is the lower bound for 120, rounded to the nearest 5?

A rectangle has sides of 5.6 cm and 8.4 cm rounded to the nearest millimetre. What is the lower bound for the perimeter?

The side length of a square is rounded to the nearest tenth of a centimetre and used to calculate its area  of 38.44 cm². What is the lower bound for the perimeter of the square?

Round 0.0030482 to two significant figures.

Round 476.8594 to three significant figures.

Which of the following cannot be rounded to  567 000?

A number has been rounded to 709 to three significant figures. Which is the only one of the following that could be that number?

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