Solution:

245 minutes

It will take 49 cuts not 50.
so 49*5 => 245 minutes

Solution:

F

Explanation: The letters are the first letter of each of the twelve months. The second month is February.

Solution:

1,2, & 3

1 x 2 x 3 = 6 and 1 + 2 + 3 = 6

Solution:

A Hole

Solution:

"mistake" is misspelled as "mitsake"

Solution:

There Are two 'the'

Solution:

A Coffin

Solution:

It can be possible if she was living in B.C. not A.D.

Solution:

To make things easier, let us just denote each box with the help of R number and C number i.e. the row number and the column number.

The rule that has been used here is:
R4C1 = (R1C1 * R3C1) - R2C1 = (5 * 2) - 8 = 2
R4C2 = (R1C2 * R3C2) - R2C2 = (7 * 4) - 10 = 18
R4C3 = (R1C3 * R3C3) - R2C3 = (6 * 5) - 12 = 18

Using the same rule for the last box:
R4C4 = (R1C4 * R3C4) - R2C4 = (4 * 9) - 17 = 19

Thus 19 is the missing number.

Solution:

Today is Thursday.
Three days before Tuesday is Staurday. Now Saturday is a day after tomorrow, so today is Thursday.