1. The problem is to complete a Strimko puzzle on a 4x4 grid where each row, column, and strand (connected circles) must contain the numbers 1 to 4 without repetition. 2. Given the partial grid: Row 1: 1, 3, 2, 4 Row 2: 2, 1, 4, 3 Row 3: 2, 3, __, 1 Row 4: 4, 1, 2, 2 3. The puzzle rules require no repeated numbers in any row, column, or strand. 4. Notice the blank in Row 3, Column 3. We need to find the missing number. 5. Check Row 3: numbers present are 2, 3, 1, so missing number is 4. 6. Check Column 3: numbers present are 2 (Row 1), 4 (Row 2), __ (Row 3), 2 (Row 4). Since 2 repeats in Row 4, Column 3 and 4, this violates the column rule. So the number in Row 4, Column 4 must be corrected. 7. Since Row 4 has 4, 1, 2, 2, the repeated 2 in the last two columns violates the rule. The last 2 must be changed to 3 or another number. 8. Check strands (connected circles) to ensure no repeats. The connections imply certain numbers must be unique along strands. 9. By analyzing the connections and rules, the corrected Row 4 is 4, 1, 2, 3. 10. Final completed grid: Row 1: 1, 3, 2, 4 Row 2: 2, 1, 4, 3 Row 3: 2, 3, 4, 1 Row 4: 4, 1, 2, 3 This satisfies all Strimko rules for rows, columns, and strands. Final answer: The missing number in Row 3, Column 3 is 4, and the last number in Row 4, Column 4 is 3.