Number Series Quiz for IPPB Scale-1 Mains 2016-17

Direction (1-8): What should come in place of the question mark (?) in the following number series?

Q1. 6  9  15  27  51  ?
(a) 84
(b) 99
(c) 123
(d) 75
(e) None of these

Q2. 15  25  40  130  ?
(a) 500
(b) 520
(c) 490
(d) 480
(e) None of these

Q3. 6  13  38  ?  532  2675
(a) 129
(b) 123
(c) 172
(d) 164
(e) None of these

Q4. 1  3  24  360  8640  302400  ?
(a) 14525100
(b) 154152000
(c) 14515200
(d) 15425100
(e) None of these

Q5. 7  9  19  45  95  ?
(a) 150
(b) 160
(c) 145
(d) 177
(e) None of these

Q6. 33  39  57  87  129  ?
(a) 183
(b) 177
(c) 189
(d) 199
(e) None of these

Q7. 19  26  40  68  124  ?
(a) 246
(b) 238
(c) 236
(d) 256
(e) None of these

Q8. 62  87  187  412  812  ?
(a) 1012
(b) 1437
(c) 1337
(d) 1457
(e) None of these

Directions (9-15): In each of these questions, one term in the given number series is wrong. Find out the wrong term.

Q9. 484  240  120  57  26.5  11.25  3.625
(a) 240
(b) 120
(c) 57
(d) 26.5
(e)11.25

Q10.  5  7  16  57  244  1245  7506
(a) 7
(b) 16
(c) 57
(d) 244
(e) 1245
            
Q11. 4  2.5  3.5  6.5  15.5  41.25  126.75
(a) 2.5 
(b) 3.5
(c) 6.5
(d) 15.5
(e) 41.25

Q12. 6  91  584  2935  11756  35277  70558
(a) 91
(b) 70558
(c) 584
(d) 2935
(e) 35277

Q13. 8 12 24 46 72 108 152
(a) 12
(b) 24
(c) 46
(d) 72
(e) None of these

Q14. 8, 13, 21, 32, 47, 63, 83
(a) 32
(b) 47
(c) 63
(d) 83
(e) None of these

Q15. 8  4.5  5.5  9.75  20.5  56.25  171.75
(a) 8
(b) 4.5
(c) 20.5
(d) 5.5
(e) 171.75


ANSWERS :

S1. Ans.(b)

Sol. +3,  +6,  +12,  +24,  +48,...

S2. Ans.(e)
Sol. The series is  ×1+10,  ×2-10,  ×3+10,  ×4-10,  ×5+10

130×4-10=520-10=510 

S15. Ans.(c)
Sol. The given series is
×1/2+1/2,×1+1,×1.5+1.5,2+2,×2.5+2.5,×3+3
Correct answer is 21.5 instead of 20.5.

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