Question

2 2 2 2 2 2 2 2=21(+;-;×;÷)

Answer 1

(22 : 2) + (22 : 2) - (2 : 2) = 21
11 + 11 - 1 = 21
22 - 1 = 21
21 = 21

Answer 2

To make the equation "2 2 2 2 2 2 2 2 = 21" true using the operators +, -, ×, and ÷ (addition, subtraction, multiplication, and division), you can use the following arrangement:

2 + 2 + 2 + 2 + 2 + 2 + 2 - 2 = 21

In this arrangement, you add the first seven 2s together (2 + 2 + 2 + 2 + 2 + 2 + 2 = 14) and then subtract the last 2 (14 - 2 = 12). Finally, you add 12 to the remaining 2 (12 + 2 = 14), resulting in the equation 2 + 2 + 2 + 2 + 2 + 2 + 2 - 2 = 21.