Let the three numbers be x, y, z. X+y / 2 + z = 177 x + y + 2z = 354 …(1) Y + z / 2 + X = 163 2x + y + z = 326 …(2) x + z / 2 + y = 138 x + 2y + z = 276 …(3) Adding eq(1),(2),(3) and dividing it by 4, we get x + y + z = 239 ,,,(4) sub (1) - (4), z = 115 sub (2) - (4), x = 87 sub (3) - (4), y = 37 The average of largest and smallest = 115+37/2 = 76
168, 164, 155, 139, ?, 78
324 972 486 1458 729 ?
...32 48 96 ? 720 2520
8 12 30 105 ? 2598.75
...18, 54, ? , 1890, 17010, 187110
660, 653, 639, 618, 590, ?
16, 16, 32, 96, ?, 1920
What will come in place of the question mark (?) in the following series?
2, 5, 14, 41, 122, 365, ?
64, 256, 128, 512, 256, ?
45, 58, 84, 123, ?, 240
