The document provides instructions for 11 math tricks involving shortcut multiplication methods. Trick #1 explains how to multiply two numbers less than 100 by taking the difference from 100 and diagonally subtracting/adding. Trick #2 is the same process for numbers greater than 100. Trick #3 involves adding digits when multiplying by 11. Trick #4 shows how to multiply any two-digit numbers. The document also includes some word problems and "brain gym" puzzles.

1. PAWAN MISHRA
Welcome
to
Math Trick
Presented By

2. trick # 1
trick # 2
trick # 3
trick # 4
trick # 5
trick # 6
trick # 7
trick # 8
trick # 9
trick # 10
trick # 11

3. Trick # 1

4. ortcut Multiplication with Numbers closer but less than 100
99
x 98
Step 1: Take the difference with 100
1
2
2
Step 2: Multiply the difference
Step 3: After Multiplying the difference
if the answer is a single digit then pu
a ‘0’ before the answer .
0
Step 4: Diagonally subtract the number
with the difference
97
97
x 98
3
2
6095
94
x 96
6
4
2490
trick # 1
91
x 92
9
8
7283

5. 95
x 99
5
1
5094
1) 98
x 94
2
6
1292
2) 92
x 99
8
1
0891
3) 93
x 97
7
3
2190
4)
91
x 92
9
8
7283
5) 96
x 95
4
5
2091
6) 94
x 91
6
9
5485
7) 97
x 91
3
9
2788
8)
Step 1: Take the difference with 100
Step 2: Multiply the difference
Step 3: After Multiplying the difference
if the answer is a single digit then put
a ‘0’ before the answer .
Step 4: Diagonally subtract the number
with the difference
trick # 1
ortcut Multiplication with Numbers closer but less than 100

6. Brain
Gym……

7. Can you connect all nine dots with only four straight line segments
without losing contact with the paper while drawing?

8. trick # 2

9. trick # 2
rtcut Multiplication with Numbers closer but greater than 100
102
x 101
2
1
20103
105
x 107
5
7
35112
109
x 102
9
2
18111
Step 1: Take the difference with 100
Step 2: Multiply the difference
Step 3: After Multiplying the difference
if the answer is a single digit then put
a ‘0’ before the answer .
Step 4: Diagonally Add the number
with the difference

10. trick # 2
rtcut Multiplication with Numbers closer but greater than 100
103
x 104
Step 1: Take the difference with 100
3
4
12
Step 2: Multiply the difference
Step 3: After Multiplying the differenc
if the answer is a single digit then p
a ‘0’ before the answer .
Step 4: Diagonally Add the number
with the difference
107
1) 2) 3) 4)102
x 104
2
4
80106
109
x 105
9
5
45114
108
x 107
8
7
56115

11. Brain
Gym……

12. 1
2 3
4 5 6
7 8 9 10
Form a NEW triangle that points down but moving only 3 coins only
1
2 3
4 5 6
7 8 9 10
7 10
1

13. 1) A pond contains a colony of bacteria. Every day every bacterium doubles .
If it covers half the pond in 10 days then in how many days the pond will be
completely covered by bacteria?
Ans: 11 days
2) Which is more heavier: 1 kg cotton or 1 kg Iron?
Ans: since both are 1 kg both are equal by weight.

14. trick # 3

15. trick # 3
Shortcut Multiplication with 11
123 x 11 =
Step 1: put two dots at the extreme en
3531
412 x 11 = 2354
Step 1: keep on adding digits from righ
forming a chain
5312 x 11 = 23485

16. trick # 3
Shortcut Multiplication with 11
321 x 11 = 1353
214 x 11 = 4532
2314 x 11 = 45452
1)
2)
3)
162 x 11 = 28714)
Step 1: put two dots at the extreme end
Step 1: keep on adding digits from right
forming a chain

17. trick # 4

18. trick # 4
Multiplication of any two digit number with any two digit number
1)
2) +
3)
32
x 21
276
3 + 4
12
x 14
861
4 + 2
13
x 14
218
4 + 3
1
26
x 23
819
6 + 12
15

19. trick # 4
Multiplication of any two digit number with any two digit number
1)
Class Work :
13
x 21
372
2) 62
x 12
447
3) 43
x 14
206
4) 51
x 31
1815
5) 15
x 13
591
6) 34
x 41
4913
7) 26
x 21
645
8) 31
x 12
273

20. Brain
Gym……

21. Put the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9 in the bubbles so that each
side adds up to the same thing.

22. Four people have to cross a bridge... It's very dark and they only have one
flashlight... They can't make it across without some light.
No more than two people can cross at a time.
Ashok can cross the bridge in 1 minute.
Karan can cross in 2 minutes.
Hakim can cross in 5 minutes.
Ramesh can cross in 10 minutes.
How can they all get across in 17 minutes?
First, Ashok and Karan go across with the flashlight
(2 minutes are now used up.)
Karan takes the flashlight back across to the others
(4 minutes are now used up.)
Hakim and Ramesh go across with the flashlight
(14 minutes are now used up.)
Ashok takes the flashlight back to the other side
(15 minutes are now used up.)
Karan and Ashok cross for the last time
(17 minutes are now used up.)
A
K
H
R
A
K
A
K
2 min
2 min
10 min
1 min2 min