Answer:
18
Step-by-step explanation:
Round 6.1 down to 6. If you divide 18 by 3 you get 6.
Therefore, 6 is one third of 18.
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6. 45 × (1 + 0.4) = 63
-450
Say the first number is x to get the idea.
The first 150 terms are 150x - 5 * 150
15x - 750
300 - 750 = -450
