Directions:(1-5) What should come in place of the question mark (?) in the following number series?
1. 54, 105, 174, 261, ?
View Answer Ans: 3 The pattern is 72 +5=54, 102 +5=105, 132 +5=174, 162 +5=261, 192 +5=366
2. 32, 48, 120, 420, ?, 10395
View Answer Ans: 4 The pattern is: 32×1.5 = 48, 48×2.5=120, 120×3.5=420, 420×4.5=1890, 1890×5.5=10395
3. 647, 168, 48, ?, 6
View Answer Ans: 2 The next term is the product of digits of the previous terms. 6x4x7=168, 1x6x8=48, 4×8=32, 3×2=6
4. 13, 16, 24, 39, 63, 98, ?
View Answer Ans: 5 The pattern is: 13 + (22 – 1) = 16, 16 + (32 – 1) = 24, 24 + (42 – 1) = 39, 39 + (52 – 1) = 63, 63 + (62 – 1) = 98, 98 + (72 – 1) = 146
5. 362, 183, 64, 20, 9, ?
View Answer Ans: 5 The pattern is: 362÷2+2=183, 183÷3+3=64, 64÷4+4=20, 20÷5+5=9, 9÷6+6=7.5
Directions:(6-10) Find the next term in the series.
6. 3, 9, 36, 180, 1080, ?
View Answer Ans: 5 The pattern is as follows: 3 x 3 = 9 9 x 4 = 36 36 x 5 = 180 180 x 6 = 1080 1080 x 7 = 7560
7. 46656, 7776, 1296, 216, 36, ?
View Answer Ans: 5 The pattern is as follows: 3 x 3 = 9 9 x 4 = 36 36 x 5 = 180 180 x 6 = 1080 1080 x 7 = 7560
8. 5718, 5618, 5474, 5278, 5022, ?
View Answer Ans: 2 The pattern is as follows: 5718 – 102 = 5618 5618 – 122 = 5474 5474 – 142 = 5278 5278 – 162 = 5022 5022 – 182 = 4698
9. 66, 66, 132, 198, 330, 528, ?
View Answer Ans: 5 The pattern is as follows: 66 + 66 = 132 66 + 132 = 198 132 + 198 = 330 198 + 330 = 528 330 + 528 = 858
10. 748, 759, 768, 775, 780, ?
View Answer Ans: 3 The pattern is as follows: 34 x 22 = 748 33 x 23 = 759 32 x 24 = 768 31 x 25 = 775 30 x 26 = 780 29 x 27 = 783
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