alleryThe numbers 3, 6, 9, 12 grow by how much each step?
A6
B2
C4
D3
Answer & Solution
Correct answer: D. 3
1. 6 - 3 = 3 and 9 - 6 = 3.
2. The step is always 3.
3. These are the multiples of 3.
_Source: Wikipedia, Arithmetic progression (CC BY-SA 4.0), Arithmetic progression_
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