14. The sum of a positive number and its reciprocal is thrice d difference of d number and its reciprocal. Find d number?

Answer:
√2 (Root 2)

13. Total monthly salary of 4men and 2women is 46,000. If woman earn 500 more than man, then the salary of woman??

Answer:
Rs. 8000
Explanation:
Let x be salary of man.
y be salary of woman.
Then,
4x+2y=46000
x=y-500.
By solving above 2 equations we get y=8000

12. Find the speed of the 2nd train.

A train 108m long moving at a speed of 50km/hr crosses a train 112m long coming from opposite direction in 6sec.The speed of the 2nd train is??


Answer:
82 km/hr

Explanation:

Let the speed of the second train be x km/hr.

Relative speed	= (x + 50) km/hr
	= (x + 50) x 5 m/sec 18
	= 250 + 5x m/sec. 18

Distance covered = (108 + 112) = 220 m.

	220	= 6
	250 + 5x 18

 250 + 5x = 660

 x = 82 km/hr.

11. Find the direction.

If South-East becomes North, North-East becomes West and so on. What will West become?

Answer: 
South - East

Explanation:

It is clear from the diagrams that new name of West will become South-East.

10. What is the age of the youngest child?

The sum of the ages of 5 children born at the interval of 3 years each is 50 years. What is the age of the youngest child?

Answer: 
4 years.

Explanation:
Let the ages of the children be x, (x + 3), (x + 6), (x + 9) and (x + 12) years.
Then, x + (x + 3) + (x + 6) + (x + 9) + (x + 12) = 50
     =>5x = 20
     =>x = 4.
Therefore, Age of the youngest child = x = 4 years.

9. Find the number.

When 75% of a number is added to 75, it results in the number itself. Find the number?

Answer:
300
Explanation:

Let the number be ‘x’. 75% of x can be written as 3/4x.

Given, 3/4x+75=x

Solving gives x=300.

8. Find the next no.

 7-3=10124
6+3=9279
5-2=763
11+2=132613
15-3=? ?

Answer: 
183612

7. Find the length of the wire.

A copper sphere of diameter 9 cm is melted and drawn into a wire of 2 mm diameter. The length of the wire is???

Answer:  
1093.5 mm or 1.1m (approx)
Explanation:
Volume of Sphere = Volume of wire(cylinder)
4(pi*R^3)/3 = pi*r^2*h
R=4.5 & r=1mm
h=1093.5 mm or 1.1m(approx)

6. Predict the output

main()
{
static int var = 5;
printf("%d ",var--);
if(var)
main();
}

Answer:
5 4 3 2 1
Explanation:
When static storage class is given, it is initialized once. The change in the value of a static variable is retained even between the function calls. Main is also treated like any other ordinary function, which can be called recursively.

5. Find the missing no?

Find the next term in the following series:
3, 5, 5, 19, 7, 41, 9, ?

Answer: 
71
Explanation:

The actual series is in this form

3, 3*2-1, 5, 5*4-1, 7, 7*6-1, 9, so the next term must be 9*8-1=71