#### At an annual function of a school, each student gives a gift to every other student. If the number of gifts is 1980, find the number of students.

**Solution:**

#### A bus covers a distance of 240 km at a uniform speed. Due to heavy rain, its speed gets reduced by 10 km/h and as such it takes two hours longer to cover the total distance. Assuming the uniform speed to be ‘x’ km/h, form an equation and solve it to evaluate x. (2016)

**Solution:**

**More Solutions:**

- Which of the following is a quadratic equation.
- If 1/2 is a root of the equation.
- The roots of the equation x2 – 3x – 10 = 0.
- If the equation 2x² – 5x + (k + 3) = 0 has equal roots
- If the equation 3x² – kx + 2k =0 roots.
- If the equation 2x² – 6x + p = 0 has real.
- Which of the following equations has no real roots.