This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.

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22. Find the value of if .
Step 1: To find , we need to find the remainder when 58 is divided by 8. Step 2: Perform the division. The remainder is 2. Therefore, . The correct option is A. The value of is .
23. Find the gradient of a line joining the points and .
Step 1: Identify the coordinates of the two points. Let and . Step 2: Use the formula for the gradient (slope) of a line: . Step 3: Calculate the gradient. The calculated gradient is -4. However, -4 is not among the given options (A. 5, B. 6, C. 6, D. 5, E. 7). It is highly probable that there is a typo in the question. If we assume the second point was instead of , then the gradient would be: Based on this assumption, the correct option would be A or D. We will choose A. The correct option is A, assuming the second point was intended to be . The gradient is .
24. If varies inversely as the square root of and when , find when .
Step 1: Write the variation equation. where is the constant of proportionality. Step 2: Use the initial conditions ( when ) to find . Step 3: Write the specific variation equation. Step 4: Use the new value () to find . Step 5: Solve for . Square both sides: The correct option is E. The value of is .
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This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.