Practice Test

Q1. A science textbook states that the diameter of a bacteria is 4 × 10⁻⁶ metres. Which statement best describes this value?

It is 4 million metres
It is a very small number close to zero
It is larger than 4 × 10⁶
It equals 0.0004 metres

Q2. Which of the following is closest in value to 3.14 × 10³?

0.00314
31.4
314
3140

Q3. A student simplifies 2⁴ × 2⁻². Which statement is true?

It equals 2²
It equals 2⁻⁸
It equals 2⁶
It equals 1

Q4. Which number is irrational?

7/9
0.125
√2
0.333

Q5. A value is written as 6.5 × 10⁴. Which situation best matches this number?

Mass of sand grain
Seconds in a minute
People in a large stadium
Width of a coin