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### Answer is 90.

**How?**

Number on the bigger line is the multiplication of the numbers on the adjacent smaller lines, thus the answer should be 10*9=90.

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**How?**

Number on the bigger line is the multiplication of the numbers on the adjacent smaller lines, thus the answer should be 10*9=90.

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**How?**

Actually number on the right side is the square of the exact opposite number.

thus the missing number should be 6^2.

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### Answer is 10

**How?**

There is gap of 4 between numbers

8+4 = 12

3+4 = 7

9-5 = 4

simillarly

?-4 = 6=> ?=10

**NOTE:** there is a better and shorter explanation(suggested by Guestlogic in comment), opposite numbers sum is 15, that’s why answer should be 15 – 5 = 10

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Explanation: Numbers in outer circle are multiplication of the corresponding number in inner circle and 3.

Check your answer:-

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Logic: For every row First column*2 + Second Column*3 = Third Column

for second row 9*2 + 17*3 = 69

for third row 13*2 + 11*3 = 59

for first row, lets say first column value is x, thus

x*2 + 13*3 = 49

2x = 49 – 39 = 10

**x = 5**

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How?

Actually the sum of the first two rows is 32

so the missing number should be 32-10-9=13.

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Answer is 97.

**How?**

11 => (1+1)(1-1) => 20

12 => (2+1)(2-1) => 31

13 => (3+1)(3-1) => 42

14 => (4+1)(4-1) => 53

similarly

18 => (8+1)(8-1) => 97

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Answer is 410.

**How?**

5 + 3 = (5-3)(5+3) = 28

9 + 1 = (9-1)(9+1) = 810

8 + 6 = (8-6)(8+6) = 214

similarly

7 + 3 = (7-3)(7+3) = 410