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### Answer is 80

**How?**

Sum multiplied by 2.

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**How?**

Sum multiplied by 2.

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**How?**

72/18 = 4

95/19 = 5

missing number should be 84/14 = 6.

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**How?**

number on the right side of the box is the multiple of the first digit on the left side and 3.

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Sum of all 4 outer box is 100

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**How?**

Multiply the two numbers and then multiply the result by 5.

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**How?**

Number in middle column is sum of the respective numbers in first and third column. thus the missing number should be 56 – 29 = 27.

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### Answer is 15

**How?**

Its simple, just multiply the number by 3.

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**Explanation:**

1 + 2 => (1)^2 + (1*2) = 3

3 + 4 => (3)^2 + (3*4) = 21

5 + 6 => (5)^2 + (5*6) = 55

Thus 4 + 5 => (4)^2 + (4*5) = 36

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**How?**

If you see the rows every next number = previous number in the row +3.