Directions:(1-5)Find the wrong term in the series given below.
1. 211, 213, 219, 237, 281, 405
Ans: 4 The next term is obtained by adding the number to the product of its digits. 211 + 2 = 213 213 + 6 = 219 219 + 18 = 237 237 + 42 = 279 279 + 126 = 405
2. 30, 39.0, 50.7, 67.91, 85.683, 111.3879
Ans: 2 The pattern is as follows: 30 x 1.3 = 39.0 39.0 x 1.3 = 50.7 50.7 x 1.3 = 65.91 65.91 x 1.3 = 85.683 85.683 x 1.3 = 111.3879
Ans: 1 From the 3rd number, each successive term is average of previous 2 terms: (76 + 140)/2 = 108 (140 + 108)/2 = 124 (108 + 124)/2 = 116 (124 + 116)/2 = 120
5. 77, 126, 164, 166, 202, 206
Ans: 3 The next term is obtained by adding the number to the square of the last digit of the previous number. 77 + 72 = 126 126 + 62 = 162 162 + 22 = 166 166 + 62 = 202 202 + 22 = 206
Directions:(6-10) What should come in place of the question mark (?) in the following number series?
6. 20, 56, 110, 182, ?
Ans: 5 The pattern is 4×5, 7×8, 10×11, 13×14, 16×17
7. 5, 6, 14, 45, 184, ?
Ans: 4 The pattern is, (5+1) X 1 = 6, (6+1) X 2 = 14, (14+1) X 3 = 45, (45+1) X 4 = 184, (184+1) X 5 = 925
8. 41, 45, 65, 95, 140, ?
Ans: 5 The next term of the series is generated by adding the product of the digits of the number to the number. For example, 41+4=45, 45+20=65, 65+30=95, 95+45=140 So the next term will be 140+0=140
9. 2744, 3375, 4096, 4913, 5832, ?
Ans: 2 The series is 143, 153, 163, 173, 183, 193. Hence the next term is 6859
10. 7, 109, 194, 262, 313, ?
Ans: 2 The successive differences between the terms are 102, 85, 68, 51, 34. Hence the next term will be 313+34 = 347
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