Answer:

3.Rule: xn = n2

Sequence: 1, 4, 9, 16, 25, 36

4.10,28,82,244,568

rule : xn=1st no. - 2nd

Step-by-step explanation:

The difference between the second and third numbers (10 and 28) is 18. Similarly, the difference between third and fourth numbers is (28 and 82) 54. So, the differences are 6, 18 and 54.

Now, 18 = 6x3

54 = 18x3

The difference between fourth and fifth number hence will be: 54x3= 162. Adding this to the fourth number (82), we can get the fifth number, which will be: 82+162=244.