Calculate the area of a cuboid of length 11cm, breadth 9cm and height 5cm.

Length $l = 11 \text{ cm}$
Breadth $b = 9 \text{ cm}$
Height $h = 5 \text{ cm}$

The correct option is B.
The volume is $\boxed{495 \text{ cm}^3}$.

26. How many notebooks sold at N150.00 each can a father purchase for N2550.00 for his ward?

The correct option is C.
He can purchase $\boxed{17}$ notebooks.

27. Reduce $\frac{105}{225}$ to a fraction in its lowest term.

Both 105 and 225 are divisible by 5.

Both 21 and 45 are divisible by 3.

The correct option is B.
The fraction in its lowest term is $\boxed{\frac{7}{15}}$.

28. Change 7 to a number in percentage.
Given the options, it is highly probable that the question intended to ask for the percentage equivalent of $\frac{7}{8}$.

The correct option is C.
The percentage is $\boxed{87\frac{1}{2}\%}$.

29. The number 10,080,008 can be interpreted in words as:

$10,000,000 \implies \text{Ten Million}$
$80,000 \implies \text{Eighty Thousand}$
$8 \implies \text{Eight}$

Ten Million, Eighty Thousand and Eight.
The correct option is B.
The number is $\boxed{\text{Ten Million, Eighty Thousand and Eight}}$.

30. Which of the following angles is an obtuse angle?

An obtuse angle is an angle that measures greater than $90^\circ$ but less than $180^\circ$.

A. $89^\circ$ is an acute angle (less than $90^\circ$).
B. $92^\circ$ is an obtuse angle (greater than $90^\circ$ and less than $180^\circ$).
C. $184^\circ$ is a reflex angle (greater than $180^\circ$).
D. $0.237^\circ$ is an acute angle.
The correct option is B.
$\boxed{92^\circ}$ is an obtuse angle.

31. Express 117 as a product of its prime factors.

The correct option is D.
The prime factors are $\boxed{3^2 \times 13}$.

32. Calculate the area of the triangle below:
The diagram shows a right-angled triangle with a base of $8 \text{ cm}$ and a height of $6 \text{ cm}$.

Base $b = 8 \text{ cm}$
Height $h = 6 \text{ cm}$

The correct option is D.
The area of the triangle is $\boxed{24 \text{ cm}^2}$.

33. Solve the simultaneous equations:

(i) $a + 6b = 13$

(ii) $5a - 6b = 7$
Adding the two equations as given results in $6a = 20$, so $a = \frac{10}{3}$, which is not an integer. Since all options are integers, there might be a typo in the second equation. Assuming the second equation was intended to be $5a - 6b = -7$ to yield integer solutions matching the options:

(i) $a + 6b = 13$

(ii) $5a - 6b = -7$

The correct option is C (assuming the typo in equation (ii) as $5a - 6b = -7$).
The solutions are $\boxed{a = 1 \text{ and } b = 2}$.

34. Factorize the expression $y^2 + 10y - 24 = 0$.

The two numbers are 12 and -2, because $12 \times (-2) = -24$ and $12 + (-2) = 10$.

The correct option is B.
The solutions are $\boxed{y = -12 \text{ or } y = 2}$.