Adeciliter is how many times larger than a millimeter?

Milliliter  centiliter  deciliter  liter   dekaliter   hectoliter kiloliter

All related by 10's   every move to the right is 10x larger than the one to its left

Since deciliter is two steps away from milliliter it is 10 x 10 or 100 times as large.

If the question is meant to be a trick then the answer is 99x larger.  

It should read "A deciliter is how many milliliters"  ofr "a milliliter is how much of a deciliter?"
 Once you say larger than you could be confusing subtraction with multiplication.  How much larger than 30 is 3?  Answer is clearly 27.  How many times as large as 3 is 30?  Answer is clearly 20. How many times larger than 3 is 30?  H?  Which one of the two does he mean?
I am sure your teacher meant you to consider multiplication, but just in case, I included the "trick" answer.

To determine in which constellation the Sun is found at any time of the year.

Explanation:

Have located the stars in the various constellation. The Sun is found at any time in the year. Based on this the birth dates are determined for its meaning. But any year or every year the sun is found in the same place and same time. The various constellation connected to sun and earth are Sagittarius, Capricorn, Taurus, Gemini, Cancer, Aquarius, Pisces, Virgo, Libra and Scorpio, Aries. The constellation and date numbers are defined with appropriate meaning. For example, the Sun is found to be in Virgo from September 16 to October 31.