book Maths Puzzle Numerical Ability

How do I solve this problem ?

The 3rd & 4th sequence is 26 & 40 and the 2nd difference is a constant 4, what is the 1st 5 terms of the sequence ?

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book Other Question

Solve this problem.

Office space. The length of a professor`s office is x feet, and the width is x + 4 feet. Write a polynomial that represents the area. and find the area if x = 10ft.
How do I do the following problem?


5^x = 6^(x +8)

Thank you for your help