The function randexp, provided by an extension, generates a random string matching the given regular expression.

Use the numbro.js extension to format numbers and currencies.

Write down the Newton-Raphson formula for finding a numerical solution to the equation $e^{mx}+bx-a=0$. If $x_0=1$ find $x_1$.

Included in the Advice of this question are:

6 iterations of the method.

Graph of the NR process using jsxgraph. Also user interaction allowing change of starting value and its effect on the process.

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Construct a line in a GeoGebra worksheet by writing its definition string by hand.

This isn't a very neat way of doing this. It's easier to define two points in GeoGebra, then make a line through those points. You can set the positions of the points from Numbas using vectors.

This question tests the student's ability to identify equivalent fractions through spotting a fraction which is not equivalent amongst a list of otherwise equivalent fractions. It also tests the students ability to convert mixed numbers into their equivalent improper fractions. It then does the reverse and tests their ability to convert an improper fraction into an equivalent mixed number. 

This question tests the students ability to factorise simple quadratic equations (where the coefficient of the x^2 term is 1) and use the factorised equation to solve the equation when it is equal to 0.

Students are asked to estimate values in possible real-life scenarios.

This question assesses the students understanding of what it means for two events to be independent or dependent. Specifically, if two events are independent then the outcomes of one event do not affect the outcomes of the other event.

Basic probability skills involving coins, dice and other events with equally likely outcomes.

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Uses JSXGraph to generate a plot for a cubic, with given critical points, along with three other incorrect graphs with modified properties. JSXGraph code is commented.

Display a fraction, given as a numerator and a denominator, as a mixed fraction when appropriate.

Solving arithmetic progressions using simultaneous equations

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Differentiate $\displaystyle \ln((ax+b)^{m})$

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Load data on some items held in the Cooper Hewitt collection, and show a table of 5 randomly picked items.

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See github issue https://github.com/numbas/editor/issues/147

This activity has a variety of percentage questions all designed to be done without a calculator.

Q1 is useful for MfB

Q2 is useful for MfB - wording to look at?

Q3 I don't understand this Q should be removed or re-worded

Q4 good questions but too many, make them more business like

Find a regression equation.

Now includes a graph of the regression line and another interactive graph gives users the opportunity to move the regression line around. Could be used for allowing users to experiment with what they think the line should be and see how this compares with the calculated line.

The question created during the "Write your first question" tutorial.