2006-12-27 13:42:20 · 29 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
49
2006-12-27 14:16:30 · answer #1 · answered by Anonymous · 1⤊ 1⤋
144 = 12²
121 = 11²
100 = 10²
81 = 9²
64 = 8²
so next number will be 7² = 49
2006-12-27 21:44:21 · answer #2 · answered by Wal C 6 · 2⤊ 0⤋
144, 121, 100, 81, 64, .... One pattern lies in the difference between each successive pairs: 144 - 121 = 23; 121 - 100 = 21; 100 - 81 = 19; 81 - 64 = 17. The next number in series should be 64 - x = 15 => 64 - 15 = x => x = 49 The answer is 49. Another is to note that each number in the descending sequence is a square: 12^2, 11^2, 10^2, 9^2, 8^2, with 7^2 = 49 being next in line.
2006-12-27 22:42:10 · answer #3 · answered by flyfisher_20750 3 · 1⤊ 1⤋
49 36 25 16 9 4 1
2006-12-27 21:47:07 · answer #4 · answered by yupchagee 7 · 1⤊ 1⤋
49
2006-12-27 22:06:35 · answer #5 · answered by abcde12345 4 · 1⤊ 0⤋
The sequences is decreasing squares
144 = 12 * 12
121 = 11 * 11
100 = 10 * 10
81 = 9 * 9
64 = 8 * 8
The next number is 49 = 7 * 7.
2006-12-27 21:45:32 · answer #6 · answered by Anonymous · 2⤊ 0⤋
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2006-12-27 22:08:46 · answer #7 · answered by robert m 7 · 1⤊ 1⤋
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2006-12-27 22:06:38 · answer #8 · answered by charles yves 1 · 1⤊ 1⤋
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2006-12-27 21:55:48 · answer #9 · answered by kalyani s 1 · 1⤊ 1⤋
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2006-12-27 21:50:01 · answer #10 · answered by Dipti 2 · 1⤊ 1⤋