【单选题】Life expectancy among adults 45 and 65 years of age by family income, sex, and race: United States, average annual 1979-89
A、sequence of numbers begins 1, 1, 1, 2, 2, 3 and then repeats this pattern forever. What is the sum of the 135th, 136th, and 137th numbers in the sequence
网考网参考答案:C
网考网解析:
Since the pattern has six digits, divide 135 by 6. The quotient is 22 and the remainder is 3. Since 22 × 6 = 132, the 132nd number completes the pattern for the 22nd time. So the 133rd, 134th, and 135 th numbers are Is, and the 136 th and 137 th are 2s; and their sum is 1 + 2 + 2 =5,
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