SAT Math Practice Problems

Question:


The first term of a certain sequence is 5 and the second term is 15. The third term and each term thereafter is found by taking the arithmetic mean of the two terms preceding it. What is the value of the first term in the sequence that is not an integer?




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-Mixed Numbers such as 2
1
2
must be entered as either a decimal, 2.5 or a fraction, 3/2.

-If a Decimal Answer does not fit in the space, it MUST be rounded AND contain 4 characters, including the decimal.
For example,
2
3
would be .667 while .666 would be incorrect and .67 would be incorrect

-Do NOT add a leading zero to a decimal, so 0.33 would be incorrect, while .33 would be correct.
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