2 × 3 + 5 – 4 ÷ 2 + 6 × 7 + 82 = ...............
Sum of sixty natural numbers from 1 onwards:
1/3 +1/6 -2/9 = ..........
The population of a town increased arithmetically from one lakh to 1.5 lakh during a decade. Find the percentage of increase in population per year.