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Quantity I: Let the present age of A and B be 7x and 10x respectively. According to question, => 10x – 7x = 9 => x = 3 A’s age after 4 years = (7 x 3) + 4 = 25 years Quantity II: 25 years Therefore, Quantity I = Quantity II
56. 23 45 89 177 363 705
...Find the maximum number of trees which can be planted, 25 meters apart, on the two sides of a straight road 2125 meters long
49 84 119 154 189 ?
48 83 118 153 188 ?
800 400 600 1500 ? 23625
...5, 14, 41, 122, 365, 1094, ?
102, 246, 442, 698, 1022, ?
61, 48, ?, 35, 87, 22
48 24 72 18 90 ?
6000 3002 1503 ? 378.75 191.375 97.6875
...