Q3.

Ram has ₹1000 in the denomination of ₹10, ₹20 and ₹5 notes. If the number of ₹10 notes is 16 more than that of ₹20 notes and the number of ₹5 notes is twice the number of ₹20 notes, find the total number of notes that Ram has.

Q4.

At present, a father is 30 years older than his son. In 12 years, the father will be three times as old as his son. What is the present age of the son?

Q5.

If \(x = \sqrt{225} + \sqrt{484}\), what is the value of \(x^2 - \left[(\sqrt{225})^2 + (32)^2\right]\)?