Subcategories

• Week 1

  Algebra Tricks, Number Algebra, Simplifying Expressions, Finding the Unknown

  Day 1 Day 2 Day 3 Day 4
  15
  Topics
  59
  Posts

  U

  For this problem a solution that could possibly be used is using divisibility rules. Note how 117 is a multiple of 9 which automatically means that and number that 117 multiplies (in this case 113) Has to be a multiple of 9 as well. Note then how only i.) is a multiple of 9 out of all three solutions, therefore the only possible solution.

• Week 2

  Sum Patterns, Squares and Roots, Fractional Powers, Decimals to Fractions

  Day 5 Day 6 Day 7 Day 8
  16
  Topics
  38
  Posts

  B

  I would want to ask a question , 3 √(2) × 6 √(2) I calculated it is bigger than √(3) ÷ 6 √(3)

  3 √(2) × 6 √(2)=36. 36>0.5
  √(3) ÷ 6 √(3)=0.5

• Week 3

  Two Variables, Many Variables, Factoring Quadratics, Quadratic Formula

  Day 9 Day 10 Day 11 Day 12
  17
  Topics
  36
  Posts

  E

  @wisegiraffe Same! I tried it and got d=3.75. I noticed this too!

• Week 4

  Coordinating Locations, Intersecting Lines, Coordinate Geometry, Slope of a Curve

  Day 13 Day 14 Day 15 Day 16
  14
  Topics
  33
  Posts

  K

  You can see that with graph paper that B is slightly longer.