Daily Practice

Foundation

30th July 2025

5 questions · Foundation tier · 282 questions in this band

1
Experimental Design
What is meant by the independent variable in an experiment?
2
Median Quartiles and IQR
For the ordered data 6, 9, 11, 14, 16, 18, 20, 23, 25, 28, find the interquartile range.
3
Index Numbers
A cost index for electricity, relative to the same base year, was 120 in 2021 and 150 in 2023. Find the percentage increase in the cost of electricity from 2021 to 2023 (not from the base year).
4
Frequency Tables and Tally Charts
A tally shows 4 full groups of five plus 2 extra marks for one category. What is the frequency?
5
Time Series and Moving Averages
Find the 4-point moving average of 8, 12, 16, 20.

You are looking at an earlier sheet. Today's sheet is the one that adds a day.

Your run is kept in this browser only, and there is no account.

Any date always gives the same five questions, so a sheet can be set again or shared. All of July 2025, including the monthly compilation PDF.