Which of the following is a NOT quantitative technique

Quantity I: A student multiplied a number by 3/5 instead of 5/3 . What is the % error in the calculation?

Quantity I. value of m is 5/6 of x. Given that x - √576 = 0

Quantity II. Value of y in √15 y - 5 = 25

Quantity I: The price of rice is decreased by 30%, by how much % the consumption is increase so that the expenditure will decreased by 10%?

Quantity-I: The total sum of all perfect square numbers in the range from 1 to 1000.

A sum of Rs.12000 was lent partly at 5% and partly at 3% simple interest. The total annual interest be Rs.450.

Quantity I. Part lent at 5% SI.

Quantity I: The age of A is sixteen times that of her son B. If the age of B is 4 years, what is the age of A?

I. 3x² + 17 x - 28 = 0

II. 3 y² -22 y + 24 = 0

Quantity-I: The area of a triangle is 72 cm². The base of the triangle is 12 cm. Find the height of the triangle.