Fun Math Tricks and Mind-Reading Feats Unveiled at AMATYC Conference

Explore a series of engaging math tricks and mind-reading demonstrations showcased at the AMATYC Conference, including calculations with numbers, predicting birthdays, becoming a psychic, and uncovering the significance of 1776. Discover fun and interactive ways to engage with mathematics and challenge your mind!

• Math Tricks
• Mind Reading
• AMATYC Conference
• Psychic Abilities
• Number Manipulation

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1. IGNITE Fun with Math J. Sriskandarajah AMATYC Conference Anaheim, October 31, 2013 jsriskandara@madisoncollege.edu

2. Super Computation Think of a 3 digit number, say 270 The final answer, adding four more three digit numbers to 270 is 2268? Ask the audience for another 3 digit number, say 581 and you include (the ninth complement) 418. Ask for one more 3 digit number, say 936 and you include 063 as your last number. 270+581+418+936+063 = 2268! Wow!!

3. Predicting birthday! Mind Reading/Mind Boggling!! 9 27 5 15 3 27 6 31 25 19 13 1 26 19 14 2 31 11 21 7 10 23 22 7 17 3 29 23 18 11 30 15

4. 7 29 6 31 25 31 10 29 28 5 14 4 24 27 14 8 12 21 22 15 28 15 13 26 20 13 30 23 12 11 30 9

5. 18 29 27 23 24 25 22 16 28 21 26 31 20 17 30 19 Volunteer is asked to point out the tables in which the day of the month he or she was born. The predicted birthday is obtained by adding the entries in the second row, fourth column of the selected tables.

6. Become a psychic! Age by dining out? The number of times a week you would like to dine out (0-7) Times by 2 then add 5 Now multiply by 50 If you have already had your birthday this year add 1763, else add 1762 Subtract the year you were born Last two digits your age and the leading digit is the number of times you plan to dine/week!

7. Significance of 1776! Take any non zero single digit, say 5 Create a three digit number by repeating this number, 555 If President Obama is our 44thpresident, what is the ranking of President Lincoln, 16 Multiply 555 by 16 = 8880 Divide this result by your original number, 8880/5 = 1776! Repeat this for any non zero single digit and stay with 16 as the divisor, end result is 1776, always!!

8. Predict birthday and age!! Birth month times 5, Suppose October, the 10X5 = 50 Add 6, 50+6 = 56 Times 4, 56X4 = 224 Add 9, 224+9 = 233 Times 5, 233X5 = 1165 Add the day of the month, say October 31, 1165+31 = 1196 Simply subtract 165, 1196-165 = 1031!!

9. Magic Squares for 2013 674 667 672 323 349 320 351 352 318 669 671 673 324 328 344 345 325 347 670 675 668 336 331 333 332 340 341 335 337 339 338 334 330 342 346 327 326 343 329 353 322 350 321 319 348

10. All these magic squares have the property, sum of all the rows, columns and the diagonals is 2013! 178 239 168 229 158 219 148 209 138 199 128 129 179 240 169 230 159 220 149 210 139 189 190 130 180 241 170 231 160 221 150 200 140 141 191 131 181 242 171 232 161 211 151 201 202 142 192 132 182 243 172 222 162 212 152 153 203 143 193 133 183 233 173 223 163 213 214 154 204 144 194 123 184 234 174 224 164 165 215 155 205 134 195 124 185 235 175 225 226 166 216 145 206 135 196 125 186 236 176 177 227 156 217 146 207 136 197 126 187 237 238 167 228 157 218 147 208 137 198 127 188

11. Pick any 11 non overlapping numbers and the sum is 2013! 219 215 221 217 211 220 212 213 214 216 218 175 171 177 173 167 176 168 169 170 172 174 241 237 243 239 233 242 234 235 236 238 240 197 193 199 195 189 198 190 191 192 194 196 131 127 133 129 123 132 124 125 126 128 130 230 226 232 228 222 231 223 224 225 227 229 142 138 144 140 134 143 135 136 137 139 141 153 149 155 151 145 154 146 147 148 150 152 164 160 166 162 156 165 157 158 159 161 163 186 182 188 184 178 187 179 180 181 183 185 208 204 210 206 200 209 201 202 203 205 207

12. Card Trick Card A Code1 Suit Club Diamond Heart Code6 7 In five steps given below, you can easily predict the unknown card! Let s roll!! Suppose your participant has an Ace of Spades, which you are not aware. 2-10 J 2-10 11 Q 12 K 13 Spade 9 8

13. Step 1. Step 2. Step 3. Step 4. Step 5. Card Number Times 2 Add 1 Times 5 Add the suit Ace = 1X2 = 1 2 2+1 = 3 3X5 = 15+9 = 15 24 Prediction: Simply subtract 5 from above! 24 5 = 19, last digit = Suit and the remaining digits indicate the card, Ace of Spades!!!

14. Three Dice Trick!!! In this number game, you can predict the three dice your opponent has rolled, which you are not aware. Perform the following six steps and surprise your opponent: Suppose the dice are 1, 3 and 6 in this order!

15. Step 1. Step 2. Step 3. Step 4. Step 5. Step 6. First die times 2 1X2 Add 5 Times 5 Add the second die Times 10 Add the third die 380+6= = 7 = 2 2+5 = 7X5 35 38 380 35+3 = 38X10 = 386 Prediction: Simply subtract 250 = 386-250 = 136! This trick could be extended to any three digit number 000-999!! Try!!!

16. One for the roadsmallest magic square with a magic sum of 2014! 503 506 509 496 508 497 502 507 498 511 504 501 505 500 499 510