The variation of single input (or some inputs) keeping at least one other variable constant is called _____.

1. 1. Partial Factor Variations
   2. Marginal Efficiency
   3. Constant Returns to Scale
   4. Functional Relationship

Regular expression for all strings starts with ab and ends with aab is given as _____.

1. 1. aba *b*aab
   2. ab(ab)* aab
   3. aab * ba * ba
   4. ab(a+b) *aab

If a graph is a complete graph with n vertices, then how many spanning trees a complete graphs can have? Where n is the number of nodes in the graphs

1. 1. n(n+1)
   2. n(n+0)
   3. n2
   4. n(n+2)

Who was the founder of Geometry?

1. 1. Kepler
   2. Euclid
   3. Khwarizmi
   4. Pythagoras

A person was asked to state his age in years. His reply was, “Take my age three years hence, multiply it by 3 and then subtract three times my age three years ago and you will know how old I am?” What was the age of the person?

1. 1. 18 years
   2. 20 years
   3. 22 years
   4. 25 years

Nadia’s father was 38 years of age when she was born while her mother was 36 years old when her brother four years younger to her was born. What is the difference between the ages of her parents?

1. 1. 3 years
   2. 6 years
   3. 9 years
   4. 10 years

If 6 years are subtracted from the present age of Gulshan and the remainder is divided by 18, then the present age of his grandson Ali is obtained. If Ali is 2 years younger to Moeen whose age is 5 years, then what is Gulshan’s present age?

1. 1. 40 years
   2. 60 years
   3. 68 years
   4. 70 years

In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, the present age of B is _____.

1. 1. 30 years
   2. 33 years
   3. 39 years
   4. 45 years

A father said to his son, “I was as old as you are at present at the time of your birth.” If the father’s age is 38 years now, the son’s age five years back was _____.

1. 1. 10 years
   2. 15 years
   3. 19 years
   4. 22 years

The difference between the ages of two persons is 10 years. Fifteen years ago, the elder one was twice as old as the younger one. The present age of the elder person is _____.

1. 1. 30 years
   2. 35 years
   3. 40 years
   4. 45 years