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# Number Series Questions and Answers Quiz 1

IBPS EXAM Guru

1 . Directions (1-5):In the following number series only one number is wrong.Find out the wrong number.

$13\,\,\, 25\,\,\, 40\,\,\, 57\,\,\, 79\,\,\, 103\,\,\, 130$

 A.   25 B.   40 C.   57 D.   79
2 . $850\,\,\,\, 600\,\,\,\, 550\,\,\,\, 500\,\,\,\, 475\,\,\,\, 462.5\,\,\, 456.25$

 A.   600 B.   550 C.   500 D.   462.5
3 . $2\,\,\, 10\,\,\, 18\,\,\, 54\,\,\, 162\,\,\, 486\,\,\, 1458$

 A.   18 B.   54 C.   162 D.   10
4 . $8\,\,\, 12\,\,\, 24\,\,\, 46\,\,\, 72\,\,\, 108\,\,\, 152$

 A.   12 B.   24 C.   46 D.   72
5 . $142\,\,\, 119\,\,\, 100\,\,\, 83\,\,\, 65\,\,\, 59\,\,\, 52$

 A.   65 B.   100 C.   59 D.   119
6 . Directions (6-10):What should come in place of the question mark in the following number series?

$5\,\,\, 54\,\,\, 90\,\,\, 115\,\,\, 131\,\,\, 140\,\,\, ?$

 A.   149 B.   149 C.   146 D.   144
7 . $7\,\,\, 4\,\,\, 5\,\,\, 9\,\,\, ?\,\,\, 52.5\,\,\, 160.5$

 A.   32 B.   16 C.   14 D.   20
8 . $6\,\,\, 42\,\,\, ?\,\,\, 1260\,\,\, 5040\,\,\, 15120\,\,\, 30240$

 A.   546 B.   424 C.   252 D.   325
9 . $4\,\,\, 10\,\,\, 40\,\,\, 190\,\,\, 940\,\,\, ?\,\,\, 23440$

 A.   4690 B.   2930 C.   5140 D.   3680
10 . $2\,\,\, 9\,\,\, 30\,\,\, ?\,\,\, 436\,\,\, 2195\,\,\, 13182$

 A.   216 B.   105 C.   178 D.   324

1 .
 Answer : Option C Explanation : The pattern is :13 + 12 = 25 ; 25 + 15 = 4040 + 18 = 58 ≠ 5758 + 21 = 79
2 .
 Answer : Option A Explanation : The pattern is :850 – 200 = 650 ≠ 600650 – 100 = 550550 – 25 = 475475 – 12.5 = 462.5
3 .
 Answer : Option D Explanation : The pattern is :2 × 3 = 6 ≠ 106 × 3 = 18 ; 18 × 3 = 5454 × 3 = 162
4 .
 Answer : Option C Explanation : The pattern is :8 + 4 × 1 = 12 ; 12 + 4 × 3 = 2424 + 4 × 5 = 44 ≠ 4644 + 4 × 7 = 7272 + 4 × 9 = 108
5 .
 Answer : Option A Explanation : The pattern is :142 – 23 = 119 ; 119 – 19 = 100100 – 17 = 8383 – 13 = 70 ≠ 6570 – 11 = 5959 – 7 = 52
6 .
 Answer : Option D Explanation : The pattern is:$5 + 7^2$ = 54$54 + 6^ 2$ = 90$90 + 5^ 2$ = 115$115 + 4^ 2$ = 131$131 + 3^ 2$ = 140$140 + 2^ 2$ = 140 + 4 = 144
7 .
 Answer : Option D Explanation : The pattern is :7 × 0.5 + 0.5 = 3.5 + 0.5 = 44 × 1 + 1 = 4 + 1 = 55 × 1.5 + 1.5 = 7.5 + 1.5 = 99 × 2 + 2 = 18 + 2 = 20
8 .
 Answer : Option C Explanation : The pattern is :6 × 7 = 4242 × 6 = 252252 × 5 = 1260
9 .
 Answer : Option A Explanation : The pattern is :4 × 5 – 10 = 1010 × 5 – 10 = 4040 × 5 – 10 = 190190 × 5 – 10 = 940940 × 5 – 10 = 4700 – 10 = 4690
10 .
 Answer : Option B Explanation : The pattern is :2 × 1 + 1 × 7 = 99 × 2 + 2 × 6 = 3030 × 3 + 3 × 5 = 105105 × 4 + 4 × 4 = 436436 × 5 + 5 × 3 = 2195