Find the wrong term in the foll lowing series.
80, 63, 48, 35, ?, 15

Select the number from among the given options that can replace the question mark (?) in the following series.
121, 144, 169, 196, ?

What should come in place of the question mark (?) in the given series?
76 81 91 111 151 ?

What should come in place of the question mark (?) in the given series?
61 66 72 77 83 ?

What should come in place of the question mark (?) in the given series?
24, 30, 25, 29, 26, ?

What should come in place of the question mark (?) in the given series?
21, 57, 87, 111, 129, ?

What should come in place of the question mark (?) in the given series?
5, 11, 23, 47, 95, ?

What should come in place of the question mark (?) in the given series?
20, 10, 40, 20, 80, ? ​

What should come in place of the question mark (?) in the given series?
4,9,24,69,204,?

169, 196, 225, 256, ?