# Solutions with Explanations for Number Series Practice Tests

Friends, here are the 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
24 ×=12×3= 36
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

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

5. Answer : 4.
The series in the following pattern.
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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