Let A and B be two square matrices of same order. If AB is a null matrix, then which one of the following is correct?
Both A and B are null matrices
Either A or B is a null matrix
B is a null matrix if A is a non-singular matrix
Both A and B are singular matrices
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy