Series

1. 7, 5, 7, 17, 63, 309, ? A) 1639 B) 1847 C) 1750 D) 1829 E) 1689 [expand title=”Answer & Explanation”]  B) 1847 Pattern:  7*1 – 2, 5*2 – 3, 7*3 – 4, 17*4 – 5, 63*5 – 6, 309*6 – 7 [/expand]   2. 10, 68, 222, 520, 1010, ? A) 1950 B) […]

1. 28, 38, 56, 119, 308, 875, 2576  A) 38 B) 119 C) 308 D) 875 E) 56 [expand title=”Answer & Explanation”]  A) 38 Pattern: +7, + 7*3 = +21, + 21*3 = +63, + 63*3 = +189, …. [/expand]   2. 11, 18, 46, 92, 169, 266, 388  A) 266 B) 18 C) 92 D)