Which is NOT an Operating System?

Rearrange the jumbled letters to make a meaningful word and then select the one which is different.

A wire is in the shape of a rectangle. Its length is 42.7m and breadth is 21.8m. If the same wire is re-bent in the shape of a square, what will be the measure of the side of the square?

If the mathematical operators, ‘+’ and ‘×’ are interchanged, what will be the value of the equation 9÷ 5+10–23×2

Which vitamin among the following is crucial for blood clotting?

If $$ {y={2x-1\over x+3}}$$ find x when y=1

In which city is the value of Gold determined?

What is the most cultivated crop in India?