UPSC CSAT Quiz 19.10.2020

Consider the following three- dimensional figure:

How many triangles does the above figure have?

Consider the following sum:

*+1*+2*+*3+*1=21*

In the above sum, (*) stands for

Consider the following pattern of numbers:

What is the number at (?) in the above pattern?

How many diagonals can be drawn by joining the vertices of an octagon?

The figure drawn below gives the velocity graphs of two vehicles A and B. The straight line OKP represents the velocity of vehicle A at any instant, whereas the horizontal straight line CKD represents the velocity of vehicle B at any instant. In the figure, D is the point where perpendicular from P meets the horizontal line CKD such that PD = LD:

What is the ratio between the distances covered by vehicles A and B in the time interval OL?