12. Someone has switched the numbers around on Harry's calculator!
The numbers should be in the positions shown in the left-hand diagram, but have been switched to the positions in the right-hand diagram.

Which of the following calculations will not give the correct answer when Harry uses his calculator?

A $79 \times 97$
B $78 \times 98 \quad$ C $147 \times 369$
D $123 \times 321$
E $159 \times 951 \quad$
12. E When the given calculations are performed on Harry's calculator, they will be equal to: A $97 \times 79$; B $98 \times 78$; C $369 \times 147$; D $321 \times 123$; E $357 \times 753$. All of these, except $\mathrm{E}$, are equal to the intended calculations.