exam Maths Puzzle Numerical Ability

How do I work this?

log(logb)=0.7

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exam Other Question

The second of three numbers is 4 times the first. THe third number is one more than the second. The sum of the numbers is 73. FInd the numbers How would you put the problem 2.2.2.7.7.7.7.7 in exponential form?