Exercises to create test (comparing values)

1. How to write a logical test to find the missing email in column C?

=C2<<>>= 0ISEMPTY()''''

2. How to write the test to find the cells where the names are different?

=A2 =>>=<=<<> B2

3. How to write the test to find the prices that have increased from one month to the next one?

=C2 <>=<>=><= B2

5. How to write the test to select people that have 45 years old and less?

=D2 45