Integers Test -...

Choose the correct statement from following:

The identity elements with respect to addition in integers is 

Solve: $${(-12)\times (-3) \times 4\times (-6) =}$$ ?

Suppose we represent the distance above the ground by a positive integer and that below the ground by a negative integer, then answer the following:
An elevator descends into a mine shaft at the rate of $$5\text{ m/min}$$. What will be its position after one hour? 

Sign of the product of 231 negative integer and 9 positive integer is

$$\displaystyle (-24)\times (-2)\times (-2)\times 0\times (-4) =$$

Product of two integers is - 48. lf one of the integers is - 6, then the other is ...........

$$\displaystyle (-8)\times (-2)\times (+3)\times (-4) = $$ 

Check whether closure property is verified for integers for the given operation:$$(-50)-(-20)=-30$$