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Q7) What comes in place of '?' 1, 0, 4, -5, 11, ? 1) 36 2) -14 3) 14 4) -19 Solution: Pattern used is -1, +4, -9, +16, -25. Required Number = 11 - 25 = -14 Hence, option 2. Q8) What comes in place of '?' 8, 27, 125, 512, 1728, ? 1) 5832 2) 3375 3) 4913 4) 4096 Solution: Cubes of 2, 3, 5, 8, 12,...Pattern used is +1, +2, +3, +4, +5. Required Number is cube of 5 + 12 = 17 Hence, option 3. Q9) What comes in place of '?' 5760, 2880, 960, 240, 48, ? 1) 8 2) 6 3) 9.6 4) None of these Solution: 2880 = (1/2)×5760, 960 = (1/3)×2880, 240 = (1/4)×960, 48 = (1/5)×240 Required Number = (1/6)×48 = 8 Hence, option 1. Q10) What comes in place of '?' 6, 24, 120, 336, 1320, ? 1) 5280 2) 2184 3) 2194 4) None of these Solution: 6 = 23 - 2, 24 = 33 - 3, 120 = 53 - 5, 336 = 73 - 7, 1320 = 113 - 11 Required Number = 133 - 13 = 2184 Hence, option 2. Q11) What comes in place of '?' 4, 18, 100, 294, 1210, ? 1) 2028 2) 2184 3) 2128 4) 1928 Solution: 4 = 23 - 22, 18 = 33 - 32, 100 = 53 - 52, 294 = 73 - 72, 1210 = 113 - 112 Required Number = 133 - 132 = 2028 Hence, option 1. |