Question : Directions: If 4 × 9 × 3 = 4 and 5 × 3 × 1 = 3, then 9 × 9 × 7 = ?
Option 1: 5
Option 2: 6
Option 3: 7
Option 4: 9
Correct Answer: 5
Solution :
Given:
4 × 9 × 3 = 4, 5 × 3 × 1 = 3
The pattern in the equation
→
4 × 9 × 3 = 4 is 4 + 9 + 3 = 16 = 4
2
The pattern in the equation
→
5 × 3 × 1 = 3 is 5 + 3 + 1 = 9 = 3
2
Here, the sign × means +.
Using the same pattern in equation 9 × 9 × 7
The equation becomes
–
9 + 9 + 7 = 25 = 5
2
Therefore, the square root of 25 is equal to 5.
Hence, the first option is correct.
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