Important Number Series Set 5 for Bank
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কোয়ান্টিটেটিভ অপটিটুড-নম্বর সিরিজ ম্যাথ-সেট –5
Directions: -What will come in place of question mark (?) in the given number series?
1) 1,2,6,15,31,?
A) 70
B) 56
C) 82
E) 42
E) 52
2) 41,39,43,37, 45,?
A) 51
B) 49
C) 56
D) 35
E) 58
3) 3,8,23,68,203,?
A) 575
B) 608
C) 565
D) 715
E) 725
4) 12,6,6,9,8,?
A) 45
B) 64
C) 53
D) 76
E) 42
5) 9,15,27,45,69,?
A) 72
B) 88
C) 99
D) 72
E) 92
6) 5,6,24,58,107,?
A) 180
B) 158
C) 170
D) 208
E) কোনটি নয়
7) 416,?,104,52,26,13
A) 208
B) 212
C) 228
D) 152
E) কোনটি নয়
8) 452,440,416,368,272,?
A) 198
B) 231
C) 94
D) 202
E) কোনটি নয়
9) 13,13,26,78,312,?
A) 1490
B) 1620
C) 1560
D) 1240
E) কোনটি নয়
10) 8,17,42,91,172,?
A) 241
B) 266
C) 308
D) 280
E) কোনটি নয়
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Important Banking Number Series- Solution
1. B) The pattern of the numbers series is given below
1 + (1)2, 2 + (2)2 + ……….
So, the answer is 56
2. D) There are two alternating series of +2 & -2 patterns respectively
So, the answer is 35
3. B) The difference gets multiplied by 3 successively
The series is 3 + 5= 8, 8 + 15 = 23, 23 + 45 = 68, …….
So, the answer is 608
4. A) The series is 12 * .5 = 6, 6 * 1 = 6, 6 * 1.5 = 9
So, the answer is 45
5. C) The series is
9 + (1 x 6) = 15
15 + (2 x 6) = 27
So on….
So, the answer is 99
6. C)
Diff 1, 18, 34, 49, 63
1+17=18
18+16=34
34+15=49
49+14=63
So, the answer is 170
7. A)
The series is divided by 2
So, the answer is 208
8. E)
The series is -12,-24,-48
So, the answer is 80
9. C)
The series is 13×1=13
13×2=26
26×3=78……
So, the answer is 1560
10.-E)
The series is
8+sq of 3=17
17 + sq of 5=42…..
So, the answer is 293
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Directions (11-20) What will come in place of question mark (?) in the given number series?
11) 2,4,10,?,82, 244
A) 30
B) 48
C) 28
D) 46
E) 34
12) 33,16.5,?,24.75,49.5,123.75
A) 16.5
B) 13.5
C) 22.5
D) 20.5
E) 12.5
13) 20,23,30,43,64,?
A) 85
B) 92
C) 95
D) 99
E) 88
14) 44,?,99,148.5,222.75,334.125
A) 72
B) 77
C) 66
D) 54
E) 84
15) 7,8,13,-3,22,?
A) -7
B) -10
C) -12
D) -14
E) -9
16) 124,215,342,511,?,999
A) 695
B) 625
C) 728
D) 806
E) 573
17) 516,256,126,61,28.5,?
A) 12.25
B) 16.75
C) 14.25
D) 20.20
E) 18.75
18) 7,21,50,109,?,467
A) 198
B) 228
C) 372
D) 402
E) 275
19) 18,82,118,134,138,?
A) 132
B) 198
C) 125
D) 138
E) 92
20) 5,22,103,406,?,2422
A) 1516
B) 1298
C) 1136
D) 1602
E) 1213
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Important Banking Number Series- Solution
11.C) The series is (x3-2), (x3-2),……..
So, the answer is 28
12.A) The series is x.5 , x1 , x1.5 , ….
So, the answer is 16.5
13.C)
+ 3, + 7, +13, +21, + 31
So, the answer is 95
+4,+6,+8,+10
14.C) The series is x1.5, x1.5, …….
So, the answer is 66
15.D) The series is
+ 12, – 22, ……….
So, the answer is 14
16.C) The series is (cube of number -1)
53 – 1 = 124,
62-1= 215, …..
So, the answer is 728
17.A) The series is
(516-4) ÷2=256,
(256-4) ÷2=126, …….
So, the answer is 12.25
18.B) The series is(x2 + 7), (x2 +8), …….
So, the answer is 228
19.D) The series is (+ square of number)
+ 82, + 62, ………
So, the answer is 138
20.E) The series is
(x6-8),(x5-7),(x4-6)………
So, the answer is 1213
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