Reasoning Quiz For RRB NTPC : 29th January 2020 of Number Series

Q1. Find the missing (?) in the 82,   70,   76,   64,   70,   58, ?
(a) 52
(b) 76
(c) 64
(d) 48

Q2. Find the missing (?) in the CBDA, GFHE, KJLI, ?
(a) NOPM
(b) MNOP
(c) PMNO
(d) ONPM

Q3. Find the missing (?) in the series 13,  14,   18,   27,   ?,   68,  104
(a) 36
(b) 41
(c) 43
(d) 54

Q4. Find the missing (?) in the series AIQ, BJR, CKS, DLT, ….?….
(a) ENE
(b) EMV
(c) ENU
(d) EMU

Q5. Find the missing (?) in the series 50,   49.  5,   ?,   45.  5,  42,  37.5
(a) 49
(b) 48
(c) 47.5
(d) 46

Q6. Find the missing (?) in the 3,  4,  10,  33,  ?,  645,  4116
(a) 84
(b) 136
(c) 152
(d) 142

Q7. Find the missing (?) in the  4,  9,  20,  37,  60,  89,  ?
(a) 124
(b) 134
(c) 144
(d) 154

Q8. Find the missing (?) in the 215,  216,  208,  235,  171,  ?
(a) 296
(b) 396
(c) 496
(d) 196

Q9. Find the missing (?) in the 121,  144,  190,  259,  ?,  466
(a) 351
(b) 349
(c) 374
(d) 328

Q10. Find the missing (?) in the  3,  22,  ?,  673,  2696,  8093
(a) 134
(b) 136
(c) 139
(d) 144

Solutions:

S5. Ans.(b)
Sol.
50 – 0.5 = 49.5
49.5 – 1.5 = 48
48 – 2.5 = 45.5
45.5 – 3.5 = 42
42 – 4.5 = 37.5

S6. Ans.(b)
Sol.
3 × 1 + 1 = 4
4 × 2 + 2 = 10
10 × 3 + 3 = 33
33 × 4 + 4 = 132 + 4 = 136

S9. Ans.(a)
Sol.
121 + 23 × 1 = 144
144 + 23 × 2 = 190
190 + 23 × 3 = 259
259 + 23 × 4 = 351

S10. Ans.(a)
Sol.
3 × 7 + 1 = 22
22 × 6 + 2 = 134
134 × 5 + 3 = 673
673 × 4 + 4 = 2696

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