Question : Directions: In this question, some equations are solved on the same basis as a certain system. On the same basis, find out the correct answer from the four alternatives for the unsolved equation.
If 4 × 3 = 14, 5 × 4 = 18 and 6 × 5 = 22, then find the value of 7 × 6 = ?
Option 1: 20
Option 2: 26
Option 3: 30
Option 4: 42
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Correct Answer: 26
Solution :
Given:
4 × 3 = 14; 5 × 4 = 18; 6 × 5 = 22
Multiply 2 by the sum of the numbers on the L.H.S.
Like, 4 × 3 = 14→(4 + 3) × 2 = 7 × 2 = 14
5 × 4 = 18→(5 + 4) × 2 = 9 × 2 = 18
6 × 5 = 22→(6 + 5) × 2 = 11 × 2 = 22
Similarly, follow the same pattern for 7 × 6 = ?→(7 + 6) × 2 = 13 × 2 = 26
Hence, the second option is correct.
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