Kartik is n years old. His father is 7n years old.

A pencil costs Rs p and a pen costs Rs 5p.

Leela contributed Rs y towards the Prime Minister’s Relief Fund. Leela is now left with Rs (y + 10000).

The maximum temperature on a day in Delhi was p°C. The minimum temperature was (p – 10)°C.

John planted ‘t’ plants last year. His friend Jay planted 2t + 10 plants that year.