Which letter-cluster will replace the question mark (?) to complete the given series?
 ABCD, BDFD, CFID, ?, EJOD

Which of the following numbers will replace the question mark (?) in the given series?
 1331, 2197, ?, 6859

Select the number from among the given options that can replace the question mark (?) in the following series. 

5, 18, 70, 278, ?

Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.

_ Z _ C _ L Z _ C _ L _ X _ V L _ _ _ V

Select the number from among the given options that can replace the question mark (?) in the following series

237, 196, 155, 114, ?

Which of the following numbers will replace the question mark (?) in the given series?
 17, 20, 60, 64, 256, 261, 1305, ?

Which of the following numbers will replace the question mark (?) in the given series?
 199, 211, 196, ?, 193, 217

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 45 * 9 * 3 * 7 * 5 * 133