Consider the following in respect of matrices A and B of same order: 1. A^2 – B^2 = (A+B)(A–B) 2. (A–I)(I+A) = O ⇔ A^2 = I where I is the identity matrix and O is the null matrix. Which of the above is/are correct?

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