$$1^{\frac{2}{4}}$$ =

(a)  

17 + 77 ÷ 11 + 22 - 8 × 5 =

(a)  

22 - { (6 ÷ 2) × [ (15 ÷ 5) + 8] }  =

(a)  

$$\frac{1}{2}+\frac{1}{20}+\frac{1}{200}+\frac{1}{2000}$$

(a)  

1% of 1% of 1% of 1,000,000 =

(a)  

$$\sqrt{\ x+4}=9$$

(a)  

$$\frac{1}{1+x}=\frac{1}{30}$$

(a)  

I think of a number.

If I increase it by 50%, I get 48.

What is the number?

(a)  

36 ÷ 18 - [ 100 ÷ (5² × 10 - 200) ]

(a)  

The price of a car after 20% discount is 200,000.  What is the price before discount?

(a)  

Find one answer only:

$$\left(\left(x^2+2\right)^2+2\right)^2\ =\ 121$$

(a)