Exams

For photoelectric effect to take place, the metal used as the cathode should have_________

Urdu is the official language of _________.

What will be the net discount percentage of three successive discounts of 20%, 10% and 30%?

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.
Call it a day

A car moving in the morning fog passes a man walking at 4km/h. in the same direction. The man can see the car for 3 minutes and visibility is upto a distance of 130m. The speed of the car is :

If xa+b+1=xa-b+a-ba+b, then x is equal to

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

A blessing in disguise

If xy = -18 and x2+ y2= 85, then find the value of (x + y).