What a Compound! Returns

Which of these are correct about the compound $\ce{Na2B4O7}.10\ce{H2O}$ ?

1. It is made up of four $sp^2$ - hybridised boron atoms.

2. It has two $sp^3$ - hybridised boron atoms.

3. It has two $sp^2$ - hybridised boron atoms.

4. It has four $B-O-B$ bonds .

5. It has 10 molecules of water of crystallization.

6. It is Borax.

7. It's solution gives colorless solution with phenolphthalein.

8. It may be titrated as an alkali with HCl using methyl orange indicator.

9. It has five $B-O-B$ bonds .

10. Its solution is acidic in nature.

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

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

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