Choose a word similar to the group: Calm, Peaceful, Tranquil.

C. SERENE

In the series 5, 10, 15, 20, what is the next number?

B. 25

A vehicle travels at a speed of 80 km/h for 1.5 hours. How far does it travel?

B. 120 KM

In a code language, 'RAT' is coded as '123' and 'TAR' is coded as '321'. What is the code for 'ART'?

A. 213

In the series A, B, C, D, E, F, G, how many letters come before E?

A. 4