Summative assessment is used as?

A salesman expects a gain of 13% on his cost price. If in a month his sale was ₹ 7,91,000, what was his profit ? 

An item when sold for ₹ 1,690 earned 30% profit on the cost price. Then the cost price is 

निम्नलिखित शब्दों की शुद्धता पर विचार कीजिए :

अ. आद्योपांत

ब. पश्चात्ताप

स. सहधर्मणी

द. उच्छवास

किस विकल्प में उक्त में से सभी शब्द शुद्ध हैं?

Arrange the given words in the sequence in which they occur in the dictionary.

i. Shortage

ii. Shore

iii. Shamelessly

iv. Shadiness

v. Shallow

What should come in place of the question mark '?' in the following number series?

64, 62, 65, 60, 67, ?

$$ secA(secA+tanA)(1-sinA)\over (cosec^2A-1)sin^2A$$ is equal to:

Recently which nation has successfully registered Kovid-19 vaccine for the first time?