What are the solutions to the following math problems: 1. Which fraction is equivalent to 2/5? 2. Express 836 to the nearest 10. 3. Express 4/5 as a percentage. 4. Which statement is correct for 'the

Option A: $\frac{3}{5}$ is not equal to $\frac{2}{5}$.
Option B: $\frac{15}{10}$ simplifies to $\frac{3}{2}$, which is not equal to $\frac{2}{5}$.
Option C: $\frac{5}{15}$ simplifies to $\frac{1}{3}$, which is not equal to $\frac{2}{5}$.
Option D: $\frac{6}{15}$. Divide both numerator and denominator by 3.

This is equivalent to $\frac{2}{5}$.

The correct option is $\boxed{\text{D}}$.

2) Express 836 to the nearest 10.

It is 6.

If it is less than 5, keep the tens digit the same. Since 6 is greater than 5, round up the tens digit (3) to 4.

The correct option is $\boxed{\text{B}}$.

3) Express $\frac{4}{5}$ as a percentage.

The correct option is $\boxed{\text{A}}$.

4) Which of the following is correct for the Mathematical statement the sum of y and 5 is less than or equal to 11?

The correct option is $\boxed{\text{D}}$.

5) Tawi and Tama shared pens in the ratio 2:3 respectively. If Tama got 18 pens, What is the total number of pens?

Tawi gets $2x$ pens and Tama gets $3x$ pens.

The correct option is $\boxed{\text{C}}$.

6) What is a period of 5 years called?

A period of 5 years is called a lustrum.
Looking at the given options:
A. century (100 years)
B. decade (10 years)
C. generation (variable, typically 20-30 years)
D. instrum (not a standard term for a period of years)

Since 'lustrum' is not an option and 'instrum' is not a recognized term, there might be an error in the question's options. However, if forced to choose, none of the options correctly describe a 5-year period. Assuming there might be a typo or a misunderstanding of the question, and given the options, no correct answer can be selected. If this were a test, you would flag this question.

7) What was the medium mark?

Mark 10: 3 learners
Mark 20: 5 learners
Mark 30: 3 learners
Mark 40: 5 learners

Since there are 16 learners (an even number), the median will be the average of the 8th and 9th values when arranged in ascending order.

10, 10, 10 (3 values)
20, 20, 20, 20, 20 (5 values)
30, 30, 30 (3 values)
40, 40, 40, 40, 40 (5 values)

The first 3 values are 10.
The next 5 values (4th to 8th) are 20. So, the 8th value is 20.
The 9th value will be the first of the 30s. So, the 9th value is 30.

The correct option is $\boxed{\text{A}}$.

8) Simplify $3.2 + 4.65 \div 1.5$

Division comes before addition.

The correct option is $\boxed{\text{B}}$.

9) A shopkeeper bought a tin of paint at K2500.00 and sold it at K2900.00. Calculate the profit percent?

The correct option is $\boxed{\text{C}}$.

10) Find the fourth number in the following number pattern 960, 1000, 1040, ______, 1120?

The pattern is an arithmetic progression where each number increases by 40.

This matches the given fifth number.

The correct option is $\boxed{\text{D}}$.

11) Express $\frac{1}{3}$ as a decimal number correct to 3 decimal places.

The fourth decimal place is 3, which is less than 5, so we keep the third decimal place as it is.

The correct option is $\boxed{\text{A}}$.

12) Figure 1 shows a triangle ABC. Use it to answer question 12.

The image for question 12 is cut off, so I cannot answer this question.

16) Simplify $4y + 7p - y - 6p$

The correct option is $\boxed{\text{D}}$.

17) and 18)

Table 2 and the questions related to it are cut off, so I cannot answer these questions.