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**Solutions with Explanations**for our

**Number Series Practice Tests.**Check the Practice Test from here and try to solve it on your own before checking these solutions. Happy Reading :)

**Set 1**

**1.**

**Answer : 2.**The given number series is based on the following pattern

12×0.5+0.5 = 6.5

6.5×1+1 = 7.5

7.5×1.5 +1.5 = 12.75

12.75 ×2 +2 = 27.5

27.5×2.5+2.5 = 71.25 and

71.25×3+ 3 = 216.75

So the ans is 216.75

**2. Answer : 1.**The given number series is based on the following pattern

16 ×= 8 × 3=24

36 ×= 18×3 =54

54 ×=27×3 =81

81×= 121.5 then

121.6×= 182.25

So the ans is 182.25

**3. Answer : 5.**The given number series is based on the following pattern.

12×1=12

12 ×1.5 =18

18 × 2.5= 45

45×4= 180

180×6.5 = 1170

Here each no multiply with 1, 1.5, 2.5, 4, 6.5, __ In this series the sum any two no's is third no. So last no is 4+ 6.5 = 10.5, now last no multiply with 10.5

1170 ×10.5 = 12285

So the ans is 12285

**4. Answer : 3.**Here given number series is based on the following pattern

22+12=22+1=23

23+22=23+4=27

27+32=27+9=36

36+42=36+16=52

52+52=52+25=77 and

77+62=77+36=113

So the answer is 113

**5. Answer : 4.**The given number series is based on the following pattern

16×1–2=14

14×2–4=24

24×3–6=66

66×4–8=256

256×5–10=1270 and

1270×6–12=7608

So the ans is 7608

**Set 2**

**1.Answer : 4.**The series is based on the following pattern

2 ×3 + 5 =11

11× 4–6 = 38

38×5 + 7 =197

197×6 –8 =1174: it is not 1172

1174× 7 + 9 =8227

8227× 8–10 =65806

Clearly 1172 is the wrong number and it should be replaced by 1174

**2. Answer : 1.**The series is based on the following pattern

16 + 12 = 17 but not 19

17 + 22 = 21

21 + 32 = 30

30 + 42 = 46

46 + 52 = 71

71 + 62 = 107

Clearly 19 should be replaced by 17

**3. Answer : 4.**The series is based on the following pattern.

7+9=16

9+16=25

25+41=66 but not 68

41+66=107

66+107=173

So 68 should be replaced by 66

**4. Answer : 3.**The series is based on the following pattern

4×0.5 = 2

2×1.5 = 3 but not 3.5

3×2.5 = 7.5

7.5 ×3.5 = 26.25

26.25×4.5 = 118.25

So 3.5 should be replaced with 3

**5. Answer : 2.**The series is based on the following pattern.

16 × 0.25 =4

4× 0.5 =2

2 × 0.75 =1.5

1.5× 1.00 =1.5 but not 1.75

1.5×1.25= 1.875

So 1.75 should be replaced by 1.5

**Set 3**

**1. Answer : 4.**The series is based on the following pattern.

17+92 = 98

98+72 =147

147+52 =172

172+32 =181

181+12 =182

So the ans is 182

**The series is based on the following pattern.**

2. Answer : 5.

2. Answer : 5.

11 + 8 = 19

19 + 12 = 31

31 + 16 = 47

47 + 20 = 67

67 + 24 =91

So the ans is 91

**3. Answer : 2.**The series is based on the following pattern.

748 – 288 = 460

460 – 144= 316

316 –72 = 244

244 –36 = 208

208 –18 = 190

**Set 4**

**1. Answer : 3.**The series in the following pattern.

12 + 4 = 16

16 + 8 = 24

24 + 12 = 36

36 + 16 = 52 and

52 + 20 = 72

**2. Answer : 4.**The series in the following pattern.

17 + 22 =21

21 + 42 = 37

37 + 62 = 73

73 + 82 = 137

137 +102 = 237

**3. Answer : 1.**The series in the following pattern.

620 – 208 = 412

412 –104 = 308

308 –52 = 256

256–26 =230 and

230–13 = 217

**Set 5**

**1. Answer : 1.**The series in the following pattern.

153–3 = 150

150–6 = 144

144–12 = 132

132–24 =108

108 – 48 =60

So the ans is 60

**2. Answer : 1.**The series in the following pattern.

31 + 9 =40

40 +18 = 58

58 +27 =85

85 + 36 =121

121 + 45 =166

**Set 6**

**1. Answer : 1.**The series in the following pattern.

36 + 11 = 37

37 + 32 = 46

46 + 52 =71

71 + 72 = 120

120 + 92 = 201

201 +112 = 322

So the ans is 120

**2. Answer : 2.**The series in the following pattern.

12 + 8 = 20

20 +80 = 100

100+800 = 900

900 + 8000 = 8900

8900 + 80000 = 88900

88900 + 800000 = 888900

**3. Answer : 5.**The series in the following pattern.

7×1 = 7

7×2 = 14

14×3 = 42

42× 4 = 168

168× 5 =

**840**
840×6 =5040

**4. Answer : 3**. The series in the following pattern.

21 + 9 = 30

30 – 18 = 12

12 + 27 = 39

39 – 36 = 3

3 + 45 = 48

48 – 54 = –6

**The series in the following pattern.**

5. Answer : 4.

5. Answer : 4.

10×2 + 4 = 24

24×2 + 4 = 52

52×2 + 4 = 108

108×2 + 4 = 220

220×2 + 4 = 444

444×2 + 4 = 892

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