Directions:(1-5) Find the wrong term in the series given below.

1. 151, 127, 105, 85, 63, 51

Ans:3
The pattern is as follows:

122 + 7 = 151

112 + 6 = 127

102 + 5 = 105

92 + 4 = 85

82 + 3 = 67

72 + 2 = 51

2. 3, 18, 54, 105, 173, 258

Ans:5
The pattern is as follows:

3 + 17 x 1 = 20

20 + 17 x 2 = 54

54 + 17 x 3 = 105

105 + 17 x 4 = 173

173 + 17 x 5 = 258

3. 338, 210, 118, 56, 10, -2

Ans:2
The pattern is as follows:

73 – 5 = 338

63 – 6 = 210

53 – 7 = 118

43 – 8 = 56

33 – 9 = 18

23 – 10 = -2

4. 58, 74, 94, 112, 134

Ans:5
The pattern is as follows:

6 x 8 + 10 = 58

7 x 9 + 11 = 74

8 x 10 + 12 = 92

9 x 11 + 13 = 112

10 x 12 + 14 = 134

5. 6, 9, 15, 21, 36, 39

Ans:3
The pattern is 3 being multipled by consecutive prime numbers:

3 x 2 = 6

3 x 3 = 9

3 x 5 = 15

3 x 7 = 21

3 x 11 = 33

3 x 13 = 39

Directions:(6-10) Find the next term in the series.

6. 32.0, 80.0, 280.0, 1260.0, 6930.0, ?

Ans:3
The pattern is as follows:

32 x 2.5 = 80.0

80 x 3.5 = 280.0

280 x 4.5 = 1260.0

1260 x 5.5 = 6930.0

6930 x 6.5 = 45045.0

7. 406, 626, 896, 1216, 1586, ?

Ans:1
The pattern is as follows:

192 + 45 = 406

242 + 50 = 626

292 + 55 = 896

342 + 60 = 1216

392 + 65 = 1586

442 + 70 = 2006

8. 22, 33, 46, 61, 78, ?

Ans:2
The pattern is as follows:

7 x 3 + 1 = 22

8 x 4 + 1 = 33

9 x 5 + 1 = 46

10 x 6 + 1 = 61

11 x 7 + 1 = 78

12 x 8 + 1 = 97

9. 262144, 32768, 4096, 512, 64, ?

Ans:4
The pattern is as follows:

262144/8 = 32768

32768/8 = 4096

4096/8 = 512

512/8 = 64

64/8 = 8

10. 133, 144, 153, 160, 165, ?

Ans:1
The pattern is as follows:

19 x 7 = 133

18 x 8 = 144

17 x 9 = 153

16 x 10 = 160

15 x 11 = 165

14 x 12 = 168

### 6 thoughts on “Number Series”

1. You actually make it seem really easy with your presentation but I find this topic to be actually
one thing which I believe I’d never understand. It seems
too complicated and very vast for me. I’m looking ahead
for your subsequent submit, I’ll attempt to get the cling of it!
Lista escape roomów

Scroll to Top