Find the missing number from the below options.

Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 18.
| Understanding |
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The logic used here is: Figure 1: (72 + 18) - (24 + 17) = 90 - 41 = 49 Similarly, Figure 2: (42 + 36) - (29 + 31) = 78 - 60 = 18 Hence, 18 is the correct answer. |