 # Changing The Subject - Odd One Out

## Which of the five versions of the formula is the odd one out because it is not equivalent to the other four?

##### Level 1Level 2Level 3Level 4Level 5Level 6Exam-StyleDescriptionHelpMore Algebra

This is level 2; Formulas which can be rearranged by multiplying or dividing both sides by a value. You can earn a trophy if you answer the questions correctly.

 A$$ab=c$$ B$$a=bc$$ C$$c=\frac ab$$ D$$bc=a$$ E$$b=\frac ac$$  A$$m=\frac np$$ B$$mp=n$$ C$$p=\frac nm$$ D$$n=mp$$ E$$mn=p$$  A$$e=3f$$ B$$f=\frac 13 e$$ C$$\frac ef = 3$$ D$$f = \frac e3$$ E$$f = \frac 3e$$  A$$y = \frac 5x$$ B$$xy = 5$$ C$$x = \frac y5$$ D$$5 = xy$$ E$$x = \frac 5y$$  A$$j = \frac h2$$ B$$2h = j$$ C$$h=2j$$ D$$\frac hj = 2$$ E$$j = \frac 12 j$$  A$$s = \frac dt$$ B$$d = st$$ C$$t = \frac ds$$ D$$s = \frac td$$ E$$st=d$$  A$$C = \pi d$$ B$$d = \frac{\pi}{C}$$ C$$d = \frac{C}{\pi}$$ D$$\pi = \frac Cd$$ E$$\pi d = C$$  A$$A=wl$$ B$$w=\frac Al$$ C$$l=\frac wA$$ D$$l = \frac Aw$$ E$$wl=A$$  This is Changing The Subject - Odd One Out level 2. You can also try:
Level 1 Level 3 Level 4 Level 5 Level 6

## Instructions

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## Description of Levels

Close Level 1 - Formulas which can be rearranged by adding or subtracting terms from both sides

Example: Make e the subject of the formula d = e - f

Level 2 - Formulas which can be rearranged by multiplying or dividing both sides by a value

Example: Rearrange the formula n = mp

Level 3 - Formulas which can be rearranged by adding, subtracting, multiplying or dividing both sides by a value

Example: Rearrange the formula b = a + cd

Level 4 - Formulas including brackets or expressions in the numerator or denominator of a fraction

Example: Rearrange the formula p = s(t + 2)

Level 5 - Formulas including squares or square roots

Example: Rearrange the formula d² = 2a + 1

Level 6 - Finding the unknown which is not the subject of a formula

Example: If m = n² + 2p, find p when m=8 and n=10

Exam Style Questions - A collection of problems in the style of GCSE or IB/A-level exam paper questions (worked solutions are available for Transum subscribers).

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## Curriculum Reference

See the National Curriculum page for links to related online activities and resources.

## Help Video

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