By Andrew Prentice For Daily Mail Australia
Published: 01:35 GMT, 27 October 2020 | Updated: 01:43 GMT, 27 October 2020
Year 12 students across NSW were left frustrated after struggling with a string of left-field questions in Monday's HSC standard mathematics exam.
A change to the syllabus resulted in many questions being common to both the standard and advanced mathematics courses.
One particular question in the standard maths paper about crickets chirping blindsided thousands of pupils.
Students were given a box-plot of temperature data and then asked to: 'calculate the number of chirps expected in a 15-second interval when the temperature is 19° Celsius. Give your answer correct to the nearest whole number'.
Oak Ukritnukun, Matrix Education's head of mathematics, admitted the question was 'really challenging.'
The question about cricket chirping (pictured above) which baffled many HSC students sitting their 2020 maths exam
Some students sitting the 2020 maths exam were confused by a few questions on Monday (stock image)
1) Identify the median (22 degrees Celsius)
2) Identify the mean temperature (21.475 degrees Celsius)
3) Find the mean number of chirps over 15 seconds (34.2)
4) Find the value of b, by substituting x and y into the equation given:
y = -10.6063 + bx