Directions (Q. 1-10): What should come in place of the question mark (?) in the following series?
1. 680 655 704 623 744 ?
1) 575
2) 675
3) 600
4) 913
5) None of these
2. 10 10 20 ? 110 300 930
1) 40
2) 35
3) 45
4) 50
3. 1 ? 22 188 2052 28748
1) 2
2) 3
3) 6
4) 16
5) 10
4. 50327 7169 1215 223 76 ?
1) 1
2) 2
3) 3
4) 4
5) 8
5. 14 34 62 ? 142 194
1) 94
2) 98
3) 108
4) 112
5) None of these
6. 124 215 342 511 ? 999
1) 695
2) 625
3) 728
4) 806
5) 573
7. 516 256 126 61 28.5 ?
1) 12.25
2) 16.75
3) 14.25
4) 20.20
5) 18.7
8. 7 21 50 109 ? 467
1) 198
2) 228
3) 372
4) 402
5) 275
9. 18 82 118 134 138 ?
1) 132
2) 198
3) 125
4) 138
5) 92
10. 5 22 103 406 ? 2422
1) 1516
2) 1298
3) 1136
4) 1602
5) 1213
1. 1
680 - 5^2 = 655
655 + 7^2 = 704
704 - 9^2 = 623
623 + 11^2 = 744
744 - 13^2 = 575
2. 3
10 × 1/2 + 5 = 10
10 × 1 + 10 = 20
20 × 1 1/2 + 15 = 45
45 × 2 + 20 = 110
110 × 2 1/2 + 25 = 300
300 × 3 + 30 = 930
3. 3
1 × 2 + 4 = 6
6 × 5 - 8 = 22
22 × 8 + 12 = 188
188 × 11 - 16 = 2052
2052 × 14 + 20 = 28748
4. 4
50327 - 122 ÷ 7 = 7169
7169 + 112 ÷ 6 = 1215
1215 - 102 ÷ 5 = 223
223 + 92 ÷ 4 = 76
76 - 82 ÷ 3 = 4
5. 2
2 + 3 × 4 = 14
4 + 5 × 6 = 34
6 + 7 × 8 = 62
8 + 9 × 10 = 98
10 + 11 × 12 = 142
12 + 13 × 14 = 194
6. 3
The series is
5^3 – 1 = 124
6^3 – 1 = 215
7^3 – 1 = 342
8^3 – 1 = 511
9^3 – 1 = 728
10^3 – 1 = 999
Reqd answer = 728.
7. 1; The series is
8. 2; The series is
9. 4; The series is
10. 5; The series is
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