Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
 19 : 80 ::23 : 96::16 : ?

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

Select the option that is related to the fifth term in the same way as the second term is related to the first term and the fourth term is related to the third term.
 GENIUS : IUNGES :: HOLDER : DELHOR :: LIGHTS : ?

Which letter-cluster will replace the question mark (?) to complete the given series?

HSDA, IZQT, ?, KNQF, LUDY

In a certain code language, 'DANCE' is written as 'ADNEC' and ‘DISCO’ is written as ‘IDSOC’. How will 'DREAM' be written in that language?

If I denotes ‘÷’, J denotes ‘×’, K denotes ‘−’ and L denotes ‘+’, then what will come in place of ‘?’ in the following equation?
 37 L 25 K (14 J 2) L (2 J 13) K (62 I 31) = ?

Which letter-cluster will replace the question mark (?) to complete the given series?
 XAPE, BIBU, ?, JYZA, NGLQ