Question
Four number-pairs are given, out of which three are
alike in a certain manner and one is different. Choose the different number-pair.Solution
The square of each digit of the first number is added together and then, the resultant is multiplied by 2 to obtain the second number.
579: 232 → [2 × {(5)² + (7)² + (9)² }] = [2 × {25 + 49 + 81}]= [2 × 155] = 310.
663: 162 → [2 × {(6)² + (6)² + (3)² }] = [2 × {36 + 36 + 9}]= [2 × 81] = 162
746: 101 → [2 × {(7)² + (4)² + (6)² }] = [2 × {49 + 16 + 36}] = [2 × 101] = 101
498: 332 → [2 × {(4)² + (9)² + (8)² }] = [2 × {16 + 81 + 64}] = [2 × 161] = 322
- What will come in place of (?) in the given number series.
3, 9, 15, 21, ?, 33 4, 4, 8, 32, 256, ?
500, 400, 315, 245, ?, 150
What will come in place of the question mark (?) in the following series?
32, ?, 30, 46, 28, 44
41, 82, ?, 984, 4920, 29520Â Â Â
What will come in place of the question mark (?) in the following number series?
17, 28, 48, ?, 123, 182
142, 148, 160, 178, ?, 232
7    12    34    117    ?   2465   14820
...What will come in place of the question mark (?) in the following series?
3.5, 9.5, 27.5, 81.5, 243.5, 729.5, ?
562, 628, 698, ?, 850
