Mohan, Ritika, Janvi, Priya and Riya are friends. Janvi runs faster than Ritika but slower than Priya. Mohan is the slowest runner and Riya runs faster than Priya. Who runs the fastest among the five?

Let's represent the running speeds using the greater-than symbol (>).
Examsbook

"Janvi runs faster than Ritika but slower than Priya":

Priya>Janvi>Ritika
"Mohan is the slowest runner":
Mohan will be placed at the end of the arrangement.

"Riya runs faster than Priya":

Riya>Priya
Combining all the conditions together in order of decreasing speeds:

Riya>Priya>Janvi>Ritika>Mohan
From this arrangement, it is clear that Riya runs the fastest.