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What would replace ?? in the triangle set ?
Question

What would replace ?? in the triangle set ?

A.

9

B.

11

C.

10

D.

12

Correct option is C

​Let's examine the pattern in the triangle sets.

First Triangle:

Top number: 4
Bottom left: 10
Bottom right: 18

Inner numbers: 6, 14, 8
Check this relation:

  • 10 + 4 = 14

  • 4 + 14 = 18

  • 10 + 8 = 18

Second Triangle:

Top number: 8
Bottom left: 14
Bottom right: 22

Inner numbers: 6, 14, 8

  • 14 + 8 = 22

  • 8 + 14 = 22

  • 14 - 6 = 8

Same pattern is consistent.

Third Triangle (incomplete):

Top: 5
Bottom left: 11
Bottom right: 15

We are given:

  • 5 + 6 = 11

  • 11 + 4 = 15

  • 5 + ?? = 15 → So, ?? = 10

The correct answer is option C) 10

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