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Question

Amora has 1000 oz of oil. She uses a constant amount of oil every day for cooking as shown. On the 9th day, how much oil will remain?

50, 100, 150, 200, 250,...

A
600 oz
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B
550 oz
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C
300 oz
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D
250 oz
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Solution

The correct option is B 550 oz
The sequence shows the oil used everyday is:

50, 100, 150, 200, 250,...

Let us find the difference between the terms.

Difference = 100 - 50 = 50

Hence, the next term in the series is 250 + 50 = 300

The consecutive terms are 350, 400, 450.

On the 9th day, 450 oz of oil would have been used.

Remaining oil = 1000 - 450 = 550

The remaining oil in the container = 550 oz

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