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Mathematics questions and answers

Mathematics Questions and Answers

How good are you with figures and formulas? Find out with these Mathematics past questions and answers. This Test is useful for both job aptitude test candidates and students preparing for JAMB, WAEC, NECO or Post UTME.

1,366.

If c and k are the roots of 6 - x - x2 = 0, find c + k

A.

2

B.

1

C.

-1

D.

-3

Correct answer is C

6 - x - x2 = 0

a = -1; b = -1; c = 6

Sum of roots = c + k = -ba

= (1)1

= -1

1,367.

If a positive integer, list the values of x which satisfy the equation 3x - 4 < 6 and x - 1 > 0

A.

{1, 2, 3}

B.

{2, 3}

C.

{2, 3, 4}

D.

{2, 3, 4, 5}

Correct answer is B

3x - 4 < 6 = 3x < 6 = 4

3x < 10

x < 103

x < 3.33 and x - 1 = 0

n > 1 = 1< x; since x is an integer, and 1 < x3.33

x = {2, 3}

1,368.

solve 2x+163x14 = 0

A.

1

B.

15

C.

-15

D.

-1

Correct answer is A

2x+163x14 = 0

4(2n+1)6(3x1)24 = 0

-10x + 10 = 0

-10x = -10

x = 1010

x = 1

1,369.

An arc of a circle subtends an angle of 60o at the centre. If the radius of the circle is 3cm, find , in terms of π, the length of the arc

A.

πcm

B.

2πcm

C.

3πcm

D.

6πcm

Correct answer is A

Length of arc = θ360×2πr

= 60360×2π×3cm

= πcm

1,370.

The capacity of a water tank is 1,800 litres. If the tank is in form of a cuboid with base 600cm by 150 cm. Find the height of the tank

A.

2cm

B.

20cm

C.

200cm

D.

2000cm

Correct answer is B

1 litre = 1000cm3

1800 litre = 1800 x 1000cm3

l x b x h = capacity

600 x 150 x h = 1800000

h = 1800000600×150cm

h = 20cm