• 2020 December(D03) Math Question 16

    Number Types & Properties

    - Largest or Smallest Value

    Adding, subtracting, multiplying and dividing positive and negative numbers
    Choice J

    Method 1: List all possible cases

    Step 1: Make a vertical list of even integers whose sum is 18

    2+16=182+16=18
    4+14=184+14=18
    6+12=186+12=18
    8+10=188+10=18

    Step 2: Multiple each to find the largest product

    2×16=322\times16=32
    4×14=564\times14=56
    6×12=726\times12=72
    8×10=808\times10=80

    Therefore 80 is the answer.

    Method 2: Notice that the product of 2 even integers must be even

    Only 80 is an even number among the choices, and therefore is the correct answer.

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