What a Compound! (Comes Back!)

Which of the following statements related to $\text {Cyclohexane}$ are correct ?

1 - $Half$ $Chair$ conformer of cyclohexane is most stable.

2 - $Boat$ $form$ conformer of cyclohexane has angle strain .

3 - $Half$ $Chair$ conformer of cyclohexane is free from angle strain.

4 - Cyclohexane has the lowest heat of combustion compared to other cycloalkanes ( eg: cyclopropane, cyclobutane etc.).

5 - The stable form of cis-1,2-dimethylcyclohexane(Chair form) is (1e, 2e ). $[e-equatorial$ , $a-axial position]$ .

6 - The stable form of $cis-2-methylcyclohexanol$ (Chair form) is [1a (Me) , 2e (OH)].

7 - The stable form of $cyclohexane-1,4-diol$ is boat form.

10 - $1,4-dimethylcyclohexane$ is optically active.

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Enter your answer as the product of the respective option numbers of correct response.

$\text {Clarification}$ : If you think statements 2,3 and 5 are true, enter your answer as $2 \times 3 \times 5 = 30.$

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This is a part of my set Aniket's Chemistry Challenges . (BEST OF JEE - ADVANCED)