CAT4MBA

please give me the solution of these questions with explanation as soon as possible.

Question 1- A number 15 is divided into three parts that are in AP and the sum of their squares is 83. Find the smallest number.

(a)    5        

(b)   3

(c)    6

(d)   8

(e)    7

Ans= b

Question 2- The first term of an AP is unity and the common difference is 4.Which of the following will be a term of this AP?

(a)    4551

(b)   10091

(c)    7881

(d)   13531

(e)    13537

Ans=c

Question 3- Booby was appointed to AMS careers in the pay scale of Rs.7000-500-12,500. Find how many years he will take to reach the maximum of the scale.

(a)    11 years

(b)   10 years

(c)    9 years

(d)   8 years

(e)    none of these

Ans=a

Please explain these questions with solution.