6 13 20 65 256 ?

8 9 20 63 256 1285 ?

4 6 9 13.5 20.25 30.375 ?

4 6 9 13.5 20.25 30.375 ?

13 13 65 585 7605 129285 ?

Find the middle term of the A.P. 6, 13 , 20 , ...... 216.

Use Property VI to simplify the following : 65 xx 813 - 65 xx 13 .

If 3x + 20 = 65 , then find the value of x

Select the option that is related to the third number in the same way as the second number is related to the first number. 256 : 13 :: 676 : ?