A ball is tossed in the air in such a way that
the path of the ball is modeled by the equation y = -x^{2} + 6x, where y represents the height of the ball in feet and x is the time in seconds. At what time, x, is the
ball at its highest point?

1. 6

2. 2

3. 3

4. 4

5. none of these

3

2.

What is the least number to be added to 8888 to
make it a perfect square?

1. 137

2. 52

3. 112

4. 90

5. none of these

1

3.

In a certain party the ratio of boys and girls was
1 : 2. But when three boys and two girls left the party,the ratio becomes 1 : 3. Total number of boys and girls present in the party?

1. 15

2. 13

3. 9

4. 12

5. none of the
above

4

4.

The ratio of Ishan's age to Joy's age is 4:5 and
that of Ram's age to Kamal's age is 5:6. If total of their ages is 69 years. How old is Joy?

1. 24 years

2. 20 years

3. 30 years

4. 25 years

5. none of the above

4

5.

In manufacturing company, number of employees in
unit A is 40, mean is USD $6400 and number of employees in unit B is 30 with mean of Rs. 5500 then combined arithmetic mean is