If A(I,2,3,...,10) ; B = (-5,-4,.....,-1) ; C = (-1, 0, 1, 2,....5) List all the elements in (B ∪ C) ∩ A

A. (-1,2,...5)

B. (-1,1,....5)

C. (1,2,..5)

D. (2,3,...10)

E. (1,2,...10)

What is the positive difference between the squares of 2.5 and 2.1 to 1 significant figures?

A. – 2.0

B. – 184

C. -1.84

D. 2

E. 18.4

Find the value of 2a - b if a + b = 8 and 4a - b = 22

A. 2

B. 4

C. 6

D. 8

E. 10

A flagpole is placed at the top of a tower. The angles of elevation of the bottom and top of the flagpole from a point on the ground 10m away are 40° and 50° respectively. Find the length of the flagpole.

A. 1.8m

B. 3.5m

C. 8.4m

D. 11.9m

E. 17.3m

Find the Iength of a diagonal of a square whose area is 288cm².

A. 24cm

B. 48cm

C. 95cm

D. 100cm

E. 124cm

Solve for x in the quadratic equation. 2x² + 12x + 10 = 0

A. x = -5, -1

B. x = -5,1

C. x = -3, -2

D. x = 3, 2

E. x = 6, 5

A surveyor measured the length of a obtained 42.55 metres. If his measurement was more than the actual length and the percentage error of his measurement was 8%, calculate the actual length of the land

A. 39.40 metres

B. 46.20 metres

C. 46.25 metres

D. 46.50 metres

E. 48.25 metres

If x + \(\frac{1}{x}\) = 8, find x² + \(\frac{1}{x^2}\)

A. 64

B. 62

C. 32

D. 16

E. 4

Evaluate 0.0025 × 2.5 × 102 to 2 significant figures.

A. 0.625 × 10^-3

B. 0.63 × 10^-2

C. 6.25 × 10^-3

D. 6.3 × 10^-2

E. 6.3 × 10^-1

What is the Value of 11101\(_{two}\)+ 10011\(_{two}\) - 10001\(_{two}\)?

A. 10001\(_{two}\)

B. 10011\(_{two}\)

C. 10111\(_{two}\)

D. 11111\(_{two}\)

E. 111111\(_{two}\)