NECO Mathematics Past Questions & Answers - Page 33

161.

Find the value of x in the equation: 9x = 729

A.

81

B.

27

C.

18

D.

9

E.

3

Correct answer is A

No explanation has been provided for this answer.

162.

Simplify \(\sqrt{6a} \times \sqrt{576a^6}\)

A.

± 16a2

B.

± 16a

C.

± 14a2

D.

± 12a2

E.

± 12a

Correct answer is D

No explanation has been provided for this answer.

163.

Two beads are drawn at random, one after the other, with replacement, from a box containing 5 red and 7 white identical beads. What is the probability that the beads are the same colour

A.

\(\frac{119}{144}\)

B.

\(\frac{95}{144}\)

C.

\(\frac{37}{72}\)

D.

\(\frac{49}{144}\)

E.

\(\frac{1}{6}\)

Correct answer is C

No explanation has been provided for this answer.

164.

A bottle of malt costs three times as much as a bottle of Mirinda. If 5 bottles of malt and 4 bottles of Mirinda cost N380.00 altogether, how much does a bottle of malt cost?

A.

N90.00

B.

N80.000

C.

N60,000

D.

N40,000

E.

N20,000

Correct answer is C

let one bottle of mirinda cost = #x, a bottle of malt will cost #3x

4 bottles of mirinda will cost = #4x, then 5 bottles of malt cost = #15x

total cost = 4x + 15x = 380

x = 380/19 = 20, therefore a bottle of mirinda cost = #20 then a bottle of mirinda will cost 3 x 20 = #60.00

165.

A chord is drawn 12cm away from the centre of a circle of radius 13cm. What is the length of the chord?

A.

169.00 cm

B.

144.00 cm

C.

25.00 cm

D.

17.69 cm

E.

10.00 cm

Correct answer is E

No explanation has been provided for this answer.