Which method returns the primitive value of a Number object?
A). toString()
B). valueOf()
C). toFixed()
D). parseFloat()
What does (123.456).toFixed(1) return?
A). 4
B). 5
C). 45
D). 123
What does isFinite(123) return?
A). 1
B). 0
C). NaN
D). undefined
How do you format a number to two decimal places?
A). toFixed(2)
B). toExponential(2)
C). toPrecision(2)
D). toString(2)
Which method returns a number in exponential notation?
A). toFixed()
B). toExponential()
C). toPrecision()
D). toString()
What is the result of isNaN('Hello')?
A). 1
B). 0
C). NaN
D). undefined
What does the method parseInt('10.5') return?
A). 5
B). 11
C). 10
D). NaN
What does Number('123') return?
A). 123
B). 123
C). NaN
D). 23
What is the output of (255).toString(2)?
A). 255
B). 11111111
C). ff
D). 10
What does Number.isNaN('123') return?
A). 1
B). 0
C). NaN
D). undefined