Number analogy: second = cube of first plus or minus a multiple of first

This type of question, asked 3 times: 20 Jul 2023 S2, 24 Jul 2023 S2, 26 Sep 2025 S1. All 3 questions below, oldest first.

Try each one first, then open its answer.

Question 1
20 Jul 2023 S2
16 $Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number. 9 : 702 :: 3 : 18 :: 6 : ?$
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Question 2
24 Jul 2023 S2
9 $Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number. 5 : 140 :: 8 : 536 :: 6 : ?$
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Question 3
26 Sep 2025 S1
10 $Choose the number that fits the analogy : 3 : 24 :: 5 : ?$
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Question 1