Ans: 5 The next number is obtained by adding sum of digits of the previous number: 22 + 2 + 2 = 26 26 + 2 + 6 = 34 34 + 3 + 4 = 41 41 + 4 + 1 = 46 46 + 4 + 6 = 56
4. 28, 196, 1568, 14112, 141120, ?
Ans: 2 The pattern is as follows: 28 x 7 = 196 196 x 8 = 1568 1568 x 9 = 14112 14112 x 10 = 141120 141120 x 11 = 1552320
5. 36, 60, 132, 252, 420, ?
Ans: 1 The pattern is as follows: 36 + 24 x 1 = 60 60 + 24 x 3 = 132 132 + 24 x 5 = 252 252 + 24 x 7 = 420 420 + 24 x 9 = 636
Directions:(6-10) Find the wrong number in the series.
6. 23, 35, 63, 121, 211, 343
Ans: 3 23 + (3 x 4) = 35 35 + (5 x 6) = 65 65 + (7 x 8) = 121 121 + (9 x 10) = 211 211 + (11 x 12) = 343 Hence the wrong term is 63
7. 150, 290, 560, 1120, 2140, 4230, 8400
Ans: 3 150 x 2 – 10 = 290 290 x 2 – 20 = 560 560 x 2 – 30 = 1090 1090 x 2 – 40 = 2140 2140 x 2 – 50 = 4230 4230 x 2 – 60 = 8400 Wrong number 1120
8. 23 104 168 216 253 278 294
Ans: 4 The difference between the terms are 92, 82, 72, 62, 52 and 42. 168+49 = 217, 217+36 = 253 Hence 216 is the incorrect term.
9. 11, 22, 88, 1424, 18304, 292864
Ans: 3 11 x (1 + 1) = 22 22 x (2 + 2) = 88 88 x (8 + 8) = 1408 1408 x (1 + 4 + 0 + 8) = 18304 18304 x (1 + 8 + 3 + 0 + 4) = 292864 So 1424 is wrong which should be 1408
10. 17, 23, 24, 26, 31, 33
Ans: 1 The subsequent term of the series is obtained by adding the absolute difference of digits to the number. 17 + |1-7| = 23 23 + |2 – 3| = 24 24 + |2 – 4| = 26 26 + |2 6| = 30 30 + |3-0| = 33 So the answer is 31.
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