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In the multiplication grid, the numbers in the orange L-shape for 3 add up to 27. What is the sum of the numbers inside the dashed blue L-shape for 5?

Class 6Patterns in Whole NumbersWhole Numbers
  • A75
  • B125
  • C150
  • D100

Step-by-Step Solution

The L for 5 is 5, 10, 15, 20 along row 5, then 25 at the corner and 20, 15, 10, 5 up column 5: , just as the L for 3 gives . (Adding 25 twice gives 150.)
Answer: B) 125

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