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3 : 54 ആയാൽ 5 : ?

A250

B67

C100

D97

Answer:

A. 250

Read Explanation:

(3 × 2) × 3² = 54 (5 × 2) × 5² = 250


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225 : 17 ; 256 : ?

A, B, C, D and E are in a row. A is between D and C, B is between A and C, D is between C and E. Which letter is in the middle?
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In the following number-pairs, the second number is obtained by applying certain mathematical operations to the first number. Select the number-pair in which the numbers are related in the same way as are the numbers of the following number-pairs. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

21, 105

19, 95