Exams

What is the unit of resistance?

There is a circular garden of radius 21 metres. A path of width 3.5 metres is constructed just outside the garden. What is the area (in metres2) of the path?

If P = 22 + 62 + 102 + 142 + ... 942 and Q = 12 + 52 + 92 + ... 812, then what is the value of P – Q?

Marked price of an item is Rs 900. On purchase of 2 items discount is 16%, on purchase of 5 items discount is 44%. Raksha buys 7 items, what is the effective discount?

If a -­ b = 3 and ab =28, then a3 - b3 is

Rajan and Manu went to a market. Rajan bought 3 erasers and 5 pens for Rs 105 and Manu bought 4 erasers and 6 pens for Rs 130. What is the price of one eraser?

In the following question, out of the four alternatives, select the alternative which is the best substitute of the words/sentence.

A remarkable concurrence of events or circumstances without apparent causal connection

Which molecule contains a polar covalent bond?