Device used to convert sound into electrical

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

25: 175 :: 38:?

If 34 # 56 = 42 and 89 # 76 = 144, then 67 # 89 = ?

Select the option that is related to second number in the same way fourth number is related to third number.

17 : ? :: 26 : 674

Select the option that is related to third number cluster in the same way second number cluster is related to first number cluster.

14: 168 :: 21: ?

Select the option that is related to the fourth number in the same way as the first number is related to the second number.

35 : 2240 :: ? : 2187

A series is given with one term missing. Choose the correct alternatives from the given ones that will complete the series.

KMN, OQR, SUV, WYZ, ____.

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

14 : 210 : : 18 :?

Theatre : Actor :: Field : ?

Select the option in which the numbers are related in the same way as are the numbers of the following set.

(15, 165, 12)

If 38 @ 18 = 88 and 46 @ 28 = 104, then 32 @ 30 = '?'.