Exams

Reverse faults occur in areas undergoing compression. In a reverse fault, the block above the fault moves up relative to the block below the fault.

Tripura, in a first-ever initiative, has started using plastic waste for the construction of roads.

The 2019 BRICS summit is the eleventh annual BRICS summit, an international relations conference attended by the heads of state or heads of government of the five-memberstates Brazil, Russia, India, China and South Africa. The summit will be held in Rio de Janeiro, Brazil, the third time Brazil has hosted the summit after the 2014 summit.

The given number series 9, 19, 21, 43, 45, ... follows a pattern that

ALternately (x 2 + 1) and  (x 1 + 2)

9 

9 x 2 + 1 = 19

19 x 1 + 2 = 21

21 x 2 + 1 = 43

43 x 1 + 2 = 45

45 x 2 + 1 = 91

Hence, the next number in the given sequence is 91.