Return the logical value TRUE for any error type except the #N/A error.

=ISERR(value)

Return the logical value TRUE if the cell contains any value that is not text.

=ISNONTEXT(value)

Count values in a range that meet a single criteria.

COUNTIF(range,criteria)

Return the rank of a number in a data set

=RANK.AVG(number,ref,[order])

Return the most common value in a data set

=MODE.SNGL(number1, [number2], ...)

Round a number down to the next multiple

=FLOOR(number, significance)

Returns the character specified by a number

CHAR(number)

Round a number up to the next multiple

=CEILING(number, significance)

Return the serial number of the current date and time

=NOW()

Return the logical value TRUE if the cell contains any text.

=ISTEXT(value)

Return the year, month or day component of a date

=YEAR(serial_number), =MONTH(serial_number), =DAY(serial_number)

Extract characters from the beginning or end of a string.

LEFT(text, [num_chars]), LEFTB(text, [num_bytes])

RIGHT(text, [num_chars]), RIGHTB(text, [num_bytes])

Return the absolute value of a number

=ABS(number)

Lookup values by column in a horizontal table or range

=HLOOKUP (lookup_value, table_array, row_index_num, [range_lookup])

Count how many values are in a list of arguments

COUNTA(value1, [value2], ...)

Return the logical value TRUE for any error type.

=ISERROR(value)