CAT Questions

---

Now, Total work = LCM(16, 8) = 48

A's one day work = + 48/16 = + 3

B's one day work = - 48/8 = -6

Given A worked for 5 days to build the wall => 5 days work = 5 x 3 = + 15

2days B joined with A in working = 2(3 - 6) = - 6

Remaining Work of building wall = 48 - (15 - 6) = 39

Now this remaining work will be done by A in = 39/3 = 13 days.

only (c) is correct since it is divisible by 4.

Let the original number of element  be x then the new no.of elements will be 

            4x5 = K                               

So K must be divisible by 4

Since,      x =  Kx5/4

A Library consists of Books in the same way Book consists Pages.

Hence, Library : Book :: Book : Pages.

The mutiplicative inverse of a number is nothing but a reciprocal of a number.

Now, the product of a number and its multiplicative inverse is always equal to 1.

For example :

Let the number be 15

Multiplicative inverse of 15 = 1/15

The product of a number and its multiplicative inverse is = 15 x 1/15 = 1.

The colour of coal is Black. In the code language ,black is called orange. So, the colour of coal is Orange.

Teams of the National Aeronautics and Space Administration (NASA) of the United States and the Indian Space Research Organisation (ISRO) would inspect the excavation being carried out at an archaeological site in Haryana’s Fatehabad district to verify claims of it being the oldest civilisation in the world. Archaeologists have recovered artefacts pre-dating the Harappan Civilisation from the site, located in village Kunal in Fatehabad district.

Man's Father is Madhu's Father's Son => Madhu itself. So the Man in the photograph is Madhu's son. 

From the given information :

how can you go = ja da ka pa....(1)
can you come here = na ka sa ja...(2)
come and go = ra pa sa....(3)
from (1)&(2), can you = ja ka...(4)
from (2)&(3), come = sa...(5)
Using (4)&(5) in (2), we get here = na.