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10 questions
5,10,15,20,_____
21
22
25
12, 10, 8, ______
4
6
7
700, 800, 900, _______
800
1000
2000
720, 620, 520, ______
420
400
402
_______ , 200, 210, 220, 230
199
190
180
1200, _______ , 1400, 1500
1301
1300
1299
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