Image can be sent over telephone lines by using

Select the option that is related to the third term in the same way as the second term is related to the first term.

CFHJO: DHKNT:: NVODI: ?

If 23 # 45 = 74 and 78 # 99 = 48, then 56 # 78 = ?

Select the option in which the numbers are not related in the same way as are the number of the following set.

(520, 8, 56)

Select the option that is related to the third word in the same way as the second word is related to the first word.

Fruit : Apple : : Fuel : ?

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

How many numbers between 1 to 50 are there, which are not only exactly divisible by 4 but also has 4 as a digit?

House: Room :: World : ?