exam Maths Puzzle Numerical Ability

write the following equation in its equivalent exponential form
log5 125=x

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exam Other Question

It takes Terry 2 hours longer to do a certain job than it takes Tom. They worked together for 3 hours. Then Tom left and Terry finished the job in one hour. How long would it take each of them to do the job alone? can you please help me solve this: a^2 + 4a + 21