② 1/2, 1/6, 1/ 12,( 1/42), 1/30; Explanation:1* 2 = 2,2 * 3 = 6,3 * 4 =12,4 * 5 = 20,5 * 6 = 30.
③ 1.0 1 ,2.02 ,3.04 ,5.07 ,( 8. 1 1) , 13. 16 ; Note: The digits before the decimal point are: 1, 2, 3, 5, (), 13. Starting from the third bit, each bit is the sum of the first two bits, for example, 3= 1+2, from which it is deduced that the number in () is 8; The numbers after the decimal point are 0 1, 02, 04, 07, () and 16 respectively. After observation, it was found that the difference between these figures increased. For example, the difference between 02 and 0 1 is 0 1, and the difference between 04 and 02 is 02, so it is concluded that () is 65438.
④16,8,12,24,60, (180) Interpretation: 8/16 =12,8/8 =1= 2. /60=6/2
⑤ 3,5, 1 1, 2 1, (35) explanation: the grade difference is 2,6, 10, which is the arithmetic difference, and the next one should be 14.
⑥ 6,7, 19,33,71,(137) Interpretation: 6 * 2+7 =19,7 * 2+19 = 33,/kloc.
7. Isn't it 7/20?
⑧-1, 0, 1, 2, 9, (730) Explanation: The last number is equal to the cube of its previous number plus 1.
Pet-name ruby1/3,115, 1/35, (1/63) Explanation:1/3 =1*/.
⑩ 80,62,45,28, (9) Explanation: 80 = 9 * 9- 1, 62 = 8 * 8-2,45 = 7 * 7-4,28 = 6 * 6-8,9 = 5 * 5-60.
⑾ 2,3, 10,15,26,35, (50) explanation: 2 = 1 * 1, 3 = 2 * 2- 1, 660.
⑿ 0,5,8,17,24,37 explanation: 0= 1* 1- 1.
5=2*2+ 1、8=3*3- 1、 17=4*4+ 1、24=5*5- 1、37=6*6+ 1