If 3 = 6, 6 = 30 and 5 = 20 then 7 = ______?
- 35
- 49
- 42
- None of these
Explanation
Step 1: Determine the pattern
Given 3 = 6, 6 = 30, and 5 = 20, let's find the pattern.
For 3 = 6, it could be 3 * 2 = 6.
For 6 = 30, it could be 6 * 5 = 30.
For 5 = 20, it could be 5 * 4 = 20.
Step 2: Identify the pattern
The pattern seems to be n * (n-1) or another pattern based on the given numbers.
Step 3: Test the pattern n * (n-1) or n * x
If we apply n * (n-1):
3 * (3-1) = 3 * 2 = 6
6 * (6-1) = 6 * 5 = 30
5 * (5-1) = 5 * 4 = 20
This pattern fits.
Step 4: Apply the pattern to 7
7 * (7-1) = 7 * 6 = 42
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