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10 questions
The number of significant figures of 0.4200 is?
2
3
4
5
Express 0.000405 in standard form.
0.405 x 10-4
4.05 x 10-3
4.05 x 10-4
4.05 x 10-5
Write 2.73 x 105 as single number.
2730
27300
273000
2730000
Diagram shows a cylindrical water tank. calculate the volume, in mm3 , of the tank.
2.31 ×106
2.31×107
2.31 ×108
2.31×109
4.16×10−4 −5.88×10−5=
3.572×10−4
3.572×10−3
1.72×10−4
1.72×10−3
50 x 50 x 50 x 50 = m x 105.
What is the value of m?
1.25
6.25
62.5
125
0.00078.4×10−5=
1.2×10−9
1.2×10−2
1.2×10−8
1.2×10−1
Evaluate (3−0.168)÷40. Give the answer correct to 2 significant figures.
0.07
0.070
0.071
0.078
What is the value of 0.1246 nanogram in microgram?
1.246 x 10-4
1.246 x 10-15
1.246 x 103
1.246 x 1015
Which of the following is true?
giga (1 000 000 000 000)
tera (1 000 000 000 000 000)
centi (0.01)
nano (0.000 001)
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