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SECTION D - NUMBER PATTERNS & ALGEBRAIC PROCESSES 17. Find the next two numbers in the sequence: 2, 5, 11, 23, _, _ 18. Simplify: 2x + 5x - 2x

Mathematics

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SECTION A - ADDITION AND SUBTRACTION

  1. 56+28=8456 + 28 = 84 The answer is 84\boxed{\text{84}}.

  2. 18−6=1218 - 6 = 12 The answer is 12\boxed{\text{12}}.

  3. 245+168=413245 + 168 = 413 The answer is 413\boxed{\text{413}}.

  4. 94−27=6794 - 27 = 67 The answer is 67\boxed{\text{67}}.

  5. 67+65=13267 + 65 = 132 The answer is 132\boxed{\text{132}}.

  6. 80−75=580 - 75 = 5 The answer is 5\boxed{\text{5}}.

SECTION B - MULTIPLICATION AND DIVISION

  1. 34×6=20434 \times 6 = 204 The answer is 204\boxed{\text{204}}.

  2. 23×14=32223 \times 14 = 322 The answer is 322\boxed{\text{322}}.

  3. Assuming the operation is addition based on the options provided:

    15+22=3715 + 22 = 37

    The answer is 37\boxed{\text{37}}.

  4. Step 1: Divide 94 by 7.

    94÷7=13 remainder 394 \div 7 = 13 \text{ remainder } 3

    The answer is 13 remainder 3\boxed{\text{13 remainder 3}}.

  5. Step 1: Divide 53 by 8.

    53÷8=6 remainder 553 \div 8 = 6 \text{ remainder } 5

    The answer is 6 remainder 5\boxed{\text{6 remainder 5}}.

  6. Step 1: Divide 4.0 by 5.

    4.0÷5=0.84.0 \div 5 = 0.8

    The answer is 0.8\boxed{\text{0.8}}.

SECTION C - INDICES, STANDARD FORM AND SURDS

  1. Simplify: 23×222^3 \times 2^2
  1. Use the exponent rule am×an=am+na^m \times a^n = a^{m+n}.

    $$
    2^3 \times 2^2 = 2^{3+2} = 2^5
    $$
    
  2. Calculate the value.

    $$
    2^5 = 32
    $$
    The answer is $\boxed{\text{32}}$.
    

    14. Write 4,500,000 in standard form.

  3. Move the decimal point to the left until there is one non-zero digit before it.

    $$
    4,500,000 = 4.5 \times 10^6
    $$
    The answer is $\boxed{4.5 \times 10^6}$.
    

    15. Simplify: 9\sqrt{9}

  4. Find the number that, when multiplied by itself, equals 9.

    $$
    \sqrt{9} = 3
    $$
    The answer is $\boxed{\text{3}}$.
    

    16. Evaluate: 505^0

  5. Any non-zero number raised to the power of 0 is 1.

    $$
    5^0 = 1
    $$
    The answer is $\boxed{\text{1}}$.
    

    SECTION D - NUMBER PATTERNS & ALGEBRAIC PROCESSES

    1. Find the next two numbers in the sequence: 2, 5, 11, 23, ___, ___
  6. Find the difference between consecutive terms.

    $5 - 2 = 3$  
    $11 - 5 = 6$  
    $23 - 11 = 12$  
    The differences are doubling ($3, 6, 12$).
    
  7. The next difference will be 12×2=2412 \times 2 = 24.

    $$
    23 + 24 = 47
    $$
    
  8. The difference after that will be 24×2=4824 \times 2 = 48.

    $$
    47 + 48 = 95
    $$
    The next two numbers are $\boxed{\text{47, 95}}$.
    

    18. Simplify: 3x+2x3x + 2x

  9. Combine the like terms.

    $$
    3x + 2x = (3+2)x = 5x
    $$
    The answer is $\boxed{5x}$.
    

    19. Solve: 2x+5=172x + 5 = 17

  10. Subtract 5 from both sides of the equation.

    $$
    2x + 5 - 5 = 17 - 5
    $$
    $$
    2x = 12
    $$
    
  11. Divide both sides by 2.

    $$
    \frac{2x}{2} = \frac{12}{2}
    $$
    $$
    x = 6
    $$
    The answer is $\boxed{6}$.
    
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