This document contains a series of math tricks and puzzles presented by Abhishek Singh to students. It introduces number puzzles like multiplying a picked number by 9 and 12,345,679 to have the author guess the number. Another puzzle involves arithmetic operations on a user's age to reveal a result. A third introduces picking a 3-digit number and doubling it to show divisibility patterns. Each puzzle is explained afterwards to reveal the mathematical principles behind the tricks. The document aims to entertain students with curious math problems and show how numbers can be manipulated for surprises.

1. ABHISHEK SINGH
VIII “B”
abhishek singh

2. Welcome
to Math Magic
abhishek singh

3. abhishek singh

4. Power in Numbers
Pick a number between 1 and 9
Multiply your number by 9
Multiply your new number by 12,345,679
We will guess your number…
abhishek singh

5. Power in Numbers
How it Works
The steps:
Pick a number between 1 and 9
Multiply your number by 9
Multiply your new number by 12,345,679
We will guess your number…
The Trick:
Simple (or not-so-simple) arithmetic!
Note: We multiplied our number by 9 and by 12,345,679
abhishek singh

6. Age Analysis
Multiply the first number of your age by 5
Add 3 to your new number
Double that figure
Add the second number of your age to that
figure
And the result is…
abhishek singh

7. Age Analysis
How it Works
The steps:
Multiply the first number of your age by 5
Add 3 to your new number
Double that figure
Add the second number of your age to that figure
Subtract 6 from that result
And the result is…
The Trick:
Another arithmetic trick! Numbers are sooo cool!
abhishek singh

8. Do You Feel Lucky?
Select a three-digit number
Enter it twice in the calculator (e.g. 123123)
Double that figure
The number is divisible by…
The number is divisible by…
Do you feel lucky?
The number is divisible by…
abhishek singh

9. Do You Feel Lucky?
How it Works
The steps:
Select a three-digit number
Enter it twice in the calculator (e.g. 123123)
Double that figure
The number is divisible by 11
The number is divisible by your original 3-digit number
Do you feel lucky?
The number is divisible by 7 AND 13
And the result is…
The Trick:
Entering a three-digit number twice (e.g. 123123) is equivalent
to multiplying it by 1001. Since 1001 = 11 x 7 x 13, the six-
digit number will be divisible by 7, 11, 13 and the original
three-digit number. abhishek singh

10. Curious Math
Pick a number from 1 to 9
Subtract 5
Multiply by 3
Square the number
(that is multiply the number by itself—NOT square root…
and yes, you can square 0. 0 x singh 0)
abhishek
0=

11. Curious Math
Add the digits until you get only one digit
(e.g. 64 = 6 + 4 = 10 = 1+ 0 = 1)
If the number is less than 5, add 5
Otherwise, subtract 4
Multiply by 2
Subtract 6
abhishek singh

12. Curious Math
Map the digit to a letter in the alphabet
(e.g. A=1, B=2, C=3, …)
Pick a name of a country that begins
with that letter
Take the second letter in the country name,
and think of a mammal that begins with
that letter
Think of the color of that mammal
abhishek singh

13. Curious Math
You will be amazed…
Are you ready…
Here we go…
You have a gray elephant from Denmark!
abhishek singh

14. Curious Math
How it Works
…or at least you probably have a gray elephant from Denmark.
The trick:
The first half of this magical problem is another arithmetic trick.
You will (it is certain) map a letter to the number 4 to get “D”).
From there we are not certain where you will go, but your answer
is quite probable!
e.g. You could have selected another country that starts with “D”
such as the Dominican Republic or Dominica or Djibouti…but it is
not probable.
You also could have selected another animal that starts with “E”
such as an elk or an ermine…but that’s not probable either : )
abhishek singh

15. kinds of
mathematicians
-- those who can
count
and those who
can't.
abhishek singh

16. T
h
a
n
k
y
o
u!!
abhishek singh