Task:
1 . Look at this series: 58, 52, 46, 40, 34, ... What number should come next?
26
28
30
32
Ans:
The series is decreasing by 6 each time:
58 - 6 = 52
52 - 6 = 46
46 - 6 = 40
40 - 6 = 34
So, continuing the pattern, 34 - 6 = 28.
The next number in the series is 28.
Program:
package day1if;
public class Numberseries1
{
public static void main (String args[])
{
int no = 58;
int count = 1;
while( count<=5)
{
System.out.println(no);
no = no-6;
count = count+ 1;
}
}
}
output:
58
52
46
40
34
28
2.Look at this series: 3, 4, 7, 8, 11, 12, ... What number should come next?
7
10
14
15
Ans:
Let’s look at the pattern:
3 → 4 (add 1)
4 → 7 (add 3)
7 → 8 (add 1)
8 → 11 (add 3)
11 → 12 (add 1)
It looks like the pattern alternates between adding 1 and adding 3.
Following this pattern, the next step is to add 3 to 12, so:
12 + 3 = 15
The next number in the series is 15.
Program:
package day1if;
public class Numberseries2 {
public static void main(String[] args) {
int no = 3;
int count =1;
while( count<=7)
{
System.out.println(no);
no = no+1;
System.out.println(no);
no = no+3;
count = count+2;
}
}
}
output:
3
4
7
8
11
12
15
16
3.Look at this series: 31, 29, 24, 22, 17, ... What number should come next?
15
14
13
12
Ans:
Let’s examine the pattern:
31 → 29 (subtract 2)
29 → 24 (subtract 5)
24 → 22 (subtract 2)
22 → 17 (subtract 5)
The pattern alternates between subtracting 2 and subtracting 5.
So, following this pattern, the next step is to subtract 2 from 17:
17 - 2 = 15
The next number in the series is 15.
Program:
package day1if;
public class Numberseries3 {
public static void main(String[] args)
{
int no = 31;
int count =0;
while( count<=5)
{
System.out.println(no);
no = no-2;
System.out.println(no);
no = no-5;
count = count+2;
}
}
}
output:
31
29
24
22
17
15
4.Look at this series: 1.5, 2.3, 3.1, 3.9, ... What number should come next?
4.2
4.4
4.7
5.1
Ans:
Let’s examine the differences between the numbers in the series:
2.3 - 1.5 = 0.8
3.1 - 2.3 = 0.8
3.9 - 3.1 = 0.8
It looks like the series increases by 0.8 each time. So, to find the next number:
3.9 + 0.8 = 4.7
The next number in the series is 4.7.
Program:
package day1if;
public class Numberseries4 {
public static void main(String[] args)
{
float no = 1.5f;
int count = 1;
while (count<6)
{
System.out.println(no);
no = no + 0.8f;
count = count+1;
}
}
}
Output:
1.5
2.3
3.1
3.8999999
4.7
5.Look at this series: 201, 202, 204, 207, ... What number should come next?
205
208
210
211
Ans:
Let’s look at the differences between the numbers:
202 - 201 = 1
204 - 202 = 2
207 - 204 = 3
It seems the series is increasing by 1, 2, 3, and so on.
Following this pattern, the next difference should be 4. So:
207 + 4 = 211
The next number in the series is 211.
Program:
package day1if;
public class Numberseries5
{
public static void main(String[] args)
{
int no = 201;
int count = 1;
while( count<6)
{
System.out.println(no);
no = no+1;
System.out.println(no);
no = no+2;
System.out.println(no);
no=no+3;
System.out.println(no);
no=no+4;
count = count+4;
}
}
}
Output:
204
207
211
212
214
217
6.Look at this series: 2, 6, 18, 54, ... What number should come next?
108
148
162
216
Ans:
The pattern in the series appears to be multiplying each term by 3:
2 × 3 = 6
6 × 3 = 18
18 × 3 = 54
So, to find the next number, we multiply 54 by 3:
54 × 3 = 162
Thus, the next number in the series is 162.
Program:
package day1if;
public class Numberseries6
{
public static void main(String[] args)
{
int no =2;
int count = 1;
while( count<6)
{
System.out.println(no);
no = no*3;
count = count+1;
}
}
}
Output:
2
6
18
54
162
7.Look at this series: 5.2, 4.8, 4.4, 4, ... What number should come next?
3
3.3
3.5
3.6
Ans:
The pattern in this series appears to be decreasing by 0.4 each time:
5.2 - 0.4 = 4.8
4.8 - 0.4 = 4.4
4.4 - 0.4 = 4
So, to find the next number, we subtract 0.4 from 4:
4 - 0.4 = 3.6
Thus, the next number in the series is 3.6.
Program:
package day1if;
public class Numberseries7
{
public static void main(String[] args)
{
float no =5.2f;
int count = 1;
while( count<6)
{
System.out.println(no);
no = no-0.4f;
count = count+1;
}
}
}
Output:
5.2
4.7999997
4.3999996
3.9999995
3.5999994
8.Look at this series: 2, 4, 6, 8, 10, ... What number should come next?
11
12
13
14
Ans:
The pattern in this series is increasing by 2 each time:
2 + 2 = 4
4 + 2 = 6
6 + 2 = 8
8 + 2 = 10
So, to find the next number, we add 2 to 10:
10 + 2 = 12
Thus, the next number in the series is 12.
Program:
package day1if;
public class Numberseries8 {
public static void main(String[] args)
{
int no =2;
int count = 0;
while( count<6)
{
System.out.println(no);
no = no+2;
count = count+1;
}
}
}
Output:
2
4
6
8
10
12
9.Look at this series: 36, 34, 30, 28, 24, ... What number should come next?
20
22
23
26
Ans:
The pattern in this series alternates between subtracting 2 and subtracting 4:
36 - 2 = 34
34 - 4 = 30
30 - 2 = 28
28 - 4 = 24
To find the next number, we subtract 2 from 24:
24 - 2 = 22
Thus, the next number in the series is 22.
Program:
package day1if;
public class Numberseries9 {
public static void main(String[] args)
{
int no =36;
int count = 0;
while( count<6)
{
System.out.println(no);
no = no-2;
System.out.println(no);
no = no-4;
count = count+2;
}
}
}
Output:
36
34
30
28
24
22
10.Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next?
22
24
25
26
Ans:
The pattern in this series alternates between subtracting 1 and adding 2:
22 - 1 = 21
21 + 2 = 23
23 - 1 = 22
22 + 2 = 24
24 - 1 = 23
So, the next step should be adding 2 to 23:
23 + 2 = 25
Thus, the next number in the series is 25.
Program:
package day1if;
public class Numberseries10
{
public static void main(String[] args)
{
int no =22;
int count = 0;
while( count<7)
{
System.out.println(no);
no = no-1;
System.out.println(no);
no = no+2;
count = count+2;
}
}
}
Output:
22
21
23
22
24
23
25
24
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