Question

1. 10 21 32 43 54 65 76 ... up to n terms.
2. 11 20 31 40 51 60 71 ... up to n terms.
3. 1 2 3 5 6 7 9 10 11 ... up to n terms.
4. 91 82 73 64 55 46 37 28 19
5. 6 26 16 36 26 46 36 56 ... up to n terms.

Answer 1

import java.util.*;
class clSeries
{
    void fnSeries_1(int n)
    {
        int term = 10;
        for(int k = 1; k <= n; k++)
        {
            System.out.print(" " + term);
            term = term + 11;
        }
    }
    void fnSeries_2(int n)
    {
        int ta = 11, tb = 20;
        for(int k = 1; k <= n; k++)
        {
            if(k % 2 != 0)
            {
                System.out.print(" " + ta);
                ta = ta + 20;
            }
            else
            {
                System.out.print(" " + tb);
                tb = tb + 20;
            }
        }
    }
    void fnSeries_3(int n)
    {
        int term = 1, k = 1;
        while(k <= n)
        {
            if(term % 4 == 0)
            {
                term++;
            }
            System.out.print(" " + term);
            term++;
            k++;
        }
    }
    void fnSeries_4()
    {
        for(int v = 91; v >= 19; v = v - 9)
        {
            System.out.print(" " + v);
        }
    }
    void fnSeries_5(int n)
    {
        int ta = 6;
        for(int k = 1; k <= n; k++)
        {
            if(k % 2 != 0)
            {
                System.out.print(" " + ta);
                ta = ta + 20;
            }
            else
            {
                System.out.print(" " + ta);
                ta = ta - 10;
            }
        }
        System.out.println();
    }
    void main(String args[])
    {
        System.out.println("\nSERIES – I");
        fnSeries_1(10);
        System.out.println("\nSERIES – II ");
        fnSeries_2(10);
        System.out.println("\nSERIES – III ");
        fnSeries_3(10);
        System.out.println("\nSERIES – IV ”);
        fnSeries_4();
        System.out.println("\nSERIES – V");
        fnSeries_5(10);
    }
}

Output:

SERIES - I :: 10 21 32 43 54 65 76 87 98 109
SERIES - II :: 11 20 31 40 51 60 71 80 91 100
SERIES - III :: 1 2 3 5 6 7 9 10 11 13 
SERIES - IV :: 91 82 73 64 55 46 37 28 19
SERIES - V:: 6 26 16 36 26 46 36 56 46 66