exam Maths Puzzle Numerical Ability

i have a couple here for you and i do not understand any of these. If you can please show these step by step answers..
1)-11< x-5 less than or equal to 8

2)-10 greater than o

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exam Other Question

In 1985, the Lincoln Memorial was 1 1/2 times as old as the Jefferson Memorial. If the Lincoln Memorial was built 21 years before the Jefferson Memorial, give the year each memorial was built. Evaluate: 2/3 logbase3 27 + logbase2 32 8(^1/5) - 3logbase4 (1/4)