Question 1
Which happened earlier?
A
Tetris invented by Alexey Pajitnov
B
Microwave oven invented (Percy Spencer)
✓ Earlier
Microwave oven invented (Percy Spencer) (1 September 1945)
came before
Tetris invented by Alexey Pajitnov (6 June 1984)
Question 2
Which happened earlier?
A
Wright brothers first flight
✓ Earlier
B
Ford introduces the Model T
Wright brothers first flight (17 December 1903)
came before
Ford introduces the Model T (1 October 1908)
Question 3
Which happened earlier?
A
First commercially viable light bulb (Edison)
B
Alexander Graham Bell makes first telephone call
✓ Earlier
Alexander Graham Bell makes first telephone call (10 March 1876)
came before
First commercially viable light bulb (Edison) (22 October 1879)