My Question is :
Q1: What is child's age? [Multiple numeric input]
Years:

---

Months:

---

Days:

---

Now i want to set different max value for
Years (max value= 17)
Months(max value= 11)
Days(max value= 30)


How this can be implemented???????????

Three separate questions.

3 different question is not possible, because my client requirement is for only one question (or i can say display of question on web should be like its a 1 question)

Then you will need to use CSS to make the three questions appear as one. The CSS details would depend on your template.

How about using a multiple numeric question and the "Whole question validation" feature: www.limesurvey.org/manual/Question_type_...28em_validation_q.29

Some not tested syntax for the question validation assuming your question uses question code "age" and subquestions are using codes 1 to 3:
age_1.NAOK <= 17 AND age_2 <= 11 AND age_3.NAOK <=30

At the question validation tip you can enter three blocks:
{if(age_1.NAOK <= 17,"","Please enter a value <= 17 for 'years'.")}
{if(age_2.NAOK <= 11,"","Please enter a value <= 17 for 'months'.")}
{if(age_3.NAOK <= 30,"","Please enter a value <= 17 for 'days'.")}

Thats awsome....

Thanks a lot Sir.