The Birthday Breakdown Trick
You have your audience ready, goodie.
Now is the time to workout the persons birthday. Ask for a volunteer.
Ask the volunteer to write the number of the month that they were born. Eg April is the 4th month

Get them to multiply that by 4
Eg 4×4 = 16

Add 13 to the new number
Eg 16 + 13 = 29

Now multiply that by 25
29 x 25 = 725

Subtract 200 from the new amount
725 – 200 = 525

Add the day of the month they were born
525 + 2 = 527

Multiply that new number by 2
527 x 2 = 1054

Subtract 40 from the new number
1054 – 40 = 1014

Multiply that new number by 50
1014 x 50 = 50700

Get them to add the last two digits of the year your were born (1971)
50700 + 71 = 50771

Ask the volunteer for the answer.
50771