exam Maths Puzzle Numerical Ability

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2- radical 5 over 2+3 radical 5. I need help to solve this.

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exam Other Question

I have a container holding 3/4 litre of liquid. I pour ot 1/3 of the liquid. How much liquid remains in the container?

Can you help me with this one please?
write in standard notation
7.34x10 to the 5th power
6.32x10 to -6 power