There are 14 people who work in an office.
If each person sends each other person
at the office one e-mail on a particular day
and there is only one e-mail between every
possible pair, how many e-mails will be
sent that day?

14

84

105

182

In the series 357,363,369,.... what will be the 10th term?

405

411

417

413

Which term should be added expression x² + 9 to obtain a perfect square ?

6x

9x

3x

12x

Simple interest on Rs..5,000 at 5% interest for 1 year will be Rs. ?

500

50

25

250

A quadrilateral whose all four sides are equal but none of its angle is of 90 degree is known as ?