| 1. Replace the ? in each series of numbers with the most appropriate number. |
1. 18, 14, 12, 11, ?, 10.25
2. 11, 12, 26, 79, 81, 163, 491, 492, ?
3. 4, 1.33, 4.17, 1.39, 4.36, 1.45, ?
4. 7, 0, 5, 8, 8, 2, 3, ?
Answer
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1. "10.5" You divide the number shown by 2 & then add 5 for each step in the sequence.
2. "986" The sequence goes multiply by 1 & then add 1, multiply by 2 & then add 2, multiply by 3 & add 1, multiply by 1 & add 2, multiply by 2 & add 1, multiply by 3 & add 2, & then the sequence repeats.
3. The sequence goes divide by 3, then multiply by pi, divide by 3, multiply by pi, etc. But only the first 2 numbers following the decimal are written down, & used for the next step in the sequence.
4. "5" The numbers shown are the digits following the decimal when you divide 12 by 17.
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| 2. What number is missing from this series? |
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The series is of the first prime numbers, and 11 was left out.
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| 3. What comes next? |
ABC 6 FGH 336 CCFCCGCCH ?
Answer
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ABC represent the numbers 1, 2, and 3. Multiply them together, and you get 6, the next step in the series. FGH represents 6, 7, and 8. Multiply them to get the next step: 336. CCFCCGCCH represents 336, 337, and 338. Multiply them to get the answer: 38272416.
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| 4. What comes next? |
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9. The numbers given are the first numbers that appear after the decimal point when converted from these fractions: 1/2, 2/3, 3/4, 4/5, 5/6, 6/7, 7/8, 8/9, and 9/10.
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