At 8% simple interest per annum a sum of money becomes Rs. 300 in 2.5 years. What was the sum invested?

Select the figure which does NOT belong to the group.

The square of 11111 is

In a hydrogen atom, an electron moves in an orbit of radius 5.0 x 10-11 m with a speed of 2.2 x 106 m/s. What is the equivalent current? (Electronic charge = 1.6 x10-19 C)

Implantation is the process of

Choose the correct figure from the answer figures that replaces the question mark.

The HCF of 36,54 and 108 is

Non-metal oxides are usually