Directions (1-15): निम्नलिखित संख्या श्रृंखला में प्रश्न चिह्न (?) के स्थान में क्या आएगा?
Q1. 8, 7, 11, 12, 14, 17, 17, 22, ?
27
20
22
24
25
Solution:
Two series are there. i.e. (8, 11, 14, 17, 20) and (7, 12, 17, 22) increasing by 3 and 5
Q2. 11, 29, 83, 245, 731, ?
2193
2189
2139
2389
2219
Solution:
Series is ×3-4
So, ? = 731×3-4=2189
So, ? = 731×3-4=2189
Q3. 3, 8, 20, 46, 100, 210, ?
436
438
416
432
430
Solution:
Series is as ×2+2, ×2+4, ×2+6, ×2+8, ×2+10, ×2+12
So, ? = 210 × 2 + 12 = 432
So, ? = 210 × 2 + 12 = 432
Q4. 5, 7, 17, 55, 225, 1131, ?
6973
6379
7639
7369
6793
Solution:
Series is as, ×1+2,×2+3,×3+4,×4+5,×5+6,×6+7
? = 1131 × 6 + 7 = 6793
? = 1131 × 6 + 7 = 6793
Q5. 1, 5, 14, 30, 55, 91, ?
128
140
135
138
142
Solution:
Pattern is +2²,+3²,+4²,+5²…….
? = 91 + 7² = 140
? = 91 + 7² = 140
Q6. 4, 1, 0.5, 0.5, 1, ?
4
5
6
4.5
5.5
Solution:
Series is
×0.25, ×0.5, ×1, ×2, ×4
×0.25, ×0.5, ×1, ×2, ×4
Q7. 6, 9, 18, 45, 126, ?
396
369
362
364
352
Solution:
Q8. 2, 4.5, 9.5, 19.5, 39.5, ?
75.5
77.5
79.5
83.5
69.5
Solution:
Series is +2.5, +5, +10, +20, +40
∴ ? = 39.5 + 40 = 79.5
∴ ? = 39.5 + 40 = 79.5
Q9. 677, 785, 901, 1025, ? , 1297
1162
1157
1297
1264
1257
Solution:
Q10. 1, 4, 15, 64, 325, ?
1856
1844
1952
1956
1786
Solution:
Series is ×2+2, ×3+3, ×4+4, ×5+5, ×6+6
∴ ? = 325 × 6 + 6 = 1956
∴ ? = 325 × 6 + 6 = 1956
Q11. 100, 121, 144, 169, 196, ?
225
230
235
240
245
Solution:
Q12. 6, 3, 3, 4.5, 9, ?
23.5
20
22.5
21.5
24
Solution:
Q13. 3, 4, 10, 33, 136, ?
685
695
775
705
675
Solution:
Q14. 441, 484, 529, 576, 625, ?
676
678
680
682
684
Solution:
Q15. 1, 6, 21, 66, 201, ?
627
609
618
606
636
Solution:
