Question # 1

Which mathematical expression is correct:

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The harmonic mean of the observation 0,15,12, is:

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3.7

7.3

6.7

no harmonic mean

Cos 60^o =.................................

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1/2

√3/2

2

2/√3

In which quadrant 0 lie when cosθ < , Sinθ < o ?

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I

II

III

IV

A single fraction which is the simplified from of two or more than two fractions is called:

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Proper fraction

Improper fraction

Rational fraction

Resultant fraction

The angle subtended by an arc at the centre of a circle is called its:

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Outer angle

Centralangle

Complementaryangle

Supplementaryangle

Equal chords of a circle (or of congruent circles) subtend equal ________ at the centre (corresponding centres):

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Arcs

Angles

Regions

Chords

Arithmetic mean is a measure that determines a value of the variable under study by dividing the sum of all values of the variable by their:

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Number

Group

Denominator

If b²-4ac > 0 and is not a perfect square, then roots are:

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Rationaland unequal

Irrationaland equal

Rationaland equal

Irrationaland unequal

Cot 60^o=________________

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1/√3

√3

1/2

2

Ange inscribed in a semi-circle is a _________ angle:

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Abtuse

Right

Supplementary

Acute

The length of a tangent to a circle is from the given point to the point of:

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start point

enc points

contact

collinear

The fourth proportional w of x : y::v : w is:

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xyv

The spread or scatterness of observations in a data set is called:

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Average

Dispersion

Central tendency

A⊆ B then A-b = __________

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A

B

∅

B-A

Factors of x²-x-2=0 are:

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(x-1)(x+2)

(x-1)(x-2)

(x+1)(x+2)

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