Question : What is the value of a?
If 15 + 18 ÷ 3 × 5 – 12 ÷ 4 + a = 100

Option 1: 54

Option 2: 58

Option 3: 48

Option 4: 42

Question : Find the value of 15 – 3 of 12 ÷ 2 + 3 of 2 ÷ 2:

Option 1: 75

Option 2: 16

Option 3: 57

Option 4: 0

Question : The value of 32 + 12 × 36 ÷ 4 + 4 – 22 ÷ 11 × 3 is:

Option 1: 142

Option 2: 138

Option 3: 150

Option 4: 130

Question : If $x^{\frac{1}{4}}+x^{\frac{-1}{4}}=2$, then what is the value of $x^{81}+\frac{1}{x^{81}}$?

Option 1: –2

Option 2: 0

Option 3: 1

Option 4: 2

Question : If $a-b=11$ and $ab=24$, then the value of $(a^2+b^2)$ is:

Option 1: 169

Option 2: 37

Option 3: 73

Option 4: 48