Day19:Number Series

Task1:

1 . Look at this series: 58, 52, 46, 40, 34,28 ... What number should come next?

24

26

25

22

Ans:

The series is decreasing by 6 each time:

58-6=52
52-6=46
46-6=40
40-6=34
34-6=28

So, continuing the pattern,28-6=22.
The next number in the series is 22.

Program:

package javaprogram;

public class number {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int num=58;
        int count=1;
        while(count<=7) {
            System.out.println(num);
            num=num-6;
            count=count+1;
        }


    }

}

Output:

58
52
46
40
34
28
22

2.Look at this series: 3, 4, 7, 8, 11, 12,15,16,19 ... What number should come next?

17

20

21

19

Ans:

Let’s look at the pattern:
3->4 (add1)
4->7 (add3)
7->8 (add1)
8->11(add3)
11->12(add1)
12->15(add3)
15->16(add1)
16->19(add3)

It looks like the pattern alternates between adding 1 and adding

Following this pattern, the next step is to add 3 to 12, so:

19+1=20

The next number in the series is 20.

Program:

package javaprogram;

public class Numberseries1 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int num=3;
        int count=1;
        while(count<=10) {
            System.out.println(num);
            num=num+1;
            System.out.println(num);
            num=num+3;
            count=count+2;

        }

    }

}

Output:

3
4
7
8
11
12
15
16
19
20

3.Look at this series: 1.5, 2.3, 3.1, 3.9, 4.7, 5.5, 6.3,... 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:

1.5 + 0.8 = 2.3
2.3 + 0.8 = 3.1
3.1 + 0.8 = 3.9
3.9 + 0.8 = 4.7
4.7 + 0.8 = 5.5
5.5 + 0.8 = 6.3

It looks like the series increases by 0.8 each time. So, to find the next number:
6.3 + 0.8 = 7.1
The next number in the series is 7.1.

Program:

package javaprogram;

public class floattask {

public static void main(String[] args) {
// TODO Auto-generated method stub
float no=1.5f;
int count=1;
while(count<=8) {
System.out.println(no);
no=no+0.8f;
count=count+1;
}
}
}

Output:

1.5
2.3
3.1
3.8999999
4.7
5.5
6.3
7.1000004