1. Systems of Numbers and Conversions

How many significant digits do 10.097 have?

• 2

• 3

• 4

• 5

Round off 0.003086 to three significant figures.

• 0.003

• 0.00309

• 0.0031

• 0.00308

Round off 34.2814 to four significant figures.

• 34.2814

• 34.281

• 34.28

• 34.0

Which number has three significant figures?

• 0.0014

• 1.4141

• 0.01414

• 0.0141

Round off 149.691 to the nearest integer.

• 149.69

• 149.7

• 150

• 149

Round off 2.371x10^-8 to two significant figures.

• 2.4x10^-8

• 2.37x10^-8

• 0.2371x10^-9

• 0.002371x10^-11

7 + 0i is

• irrational number

• real number

• imaginary number

• a variable

The number 0.123123123123… is

• irrational

• surd

• rational

• transcendental

Answer explanation

Non-terminating decimal. Can be expressed on other way. Decimal could be in fraction form.

Round off 6785768.342 to the nearest one-tenth

• 6785768

• 6785768.4

• 6785768.3

• None of these

Express decimally: Fourteen Ten thousandths

• 0.0014

• 0.00014

• 0.014

• 0.14