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1 of 9
Five is Fine
•   5x5=25
•   15x15=225
•   25x25=625
•   35x35=1225
Bride in Saree, Bridegroom in
    Dhothi, women in Churidar.
The stout girl is my daughter Rajitha


    • 5x5=25
    • 15x15=225
    • 25x25=625
    • 35x35=1225
    • We now have a hypothesis: Square of any
      number ending in 5 will have 25 as the right
      hand side of the answer.
    Verify this using various numbers
• 1_x1_=2_
• 2_x2_=6_
• 3_x3_=12_
Removing 5s from left and
25 from right we get the above logic,
which is wrong.




Family Photo in front of the
Manger, On Christmas Eve 2011
Correct form will be
1x2=2
2x3=6
3x4=12

We now have a hypothesis. Just add 1 to the second number
and multiply to get the
Left Hand Side of the answer.
Test your hypothesis
55x55 =3025
5x6=30 for the left hand side
5x5=25 for the right hand side
It works.
http://www.wiziq.com/seena


Now use Excel / Calculator to find
995 x 995
It is
99x100 on LHS
5x5 on RHS
Ditto for 9995 x 9995 = 999 000 25
This means, write the number of 9s, then write the
same number of 0s and write 25 here
9999 9999 5 x 9999 9999 5 = 9999 9999 0000 0000 25
Connected Learning
Connected Learning

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Connected Learning

  • 1.
  • 2. Five is Fine • 5x5=25 • 15x15=225 • 25x25=625 • 35x35=1225
  • 3. Bride in Saree, Bridegroom in Dhothi, women in Churidar. The stout girl is my daughter Rajitha • 5x5=25 • 15x15=225 • 25x25=625 • 35x35=1225 • We now have a hypothesis: Square of any number ending in 5 will have 25 as the right hand side of the answer. Verify this using various numbers
  • 4. • 1_x1_=2_ • 2_x2_=6_ • 3_x3_=12_ Removing 5s from left and 25 from right we get the above logic, which is wrong. Family Photo in front of the Manger, On Christmas Eve 2011
  • 5. Correct form will be 1x2=2 2x3=6 3x4=12 We now have a hypothesis. Just add 1 to the second number and multiply to get the Left Hand Side of the answer. Test your hypothesis 55x55 =3025 5x6=30 for the left hand side 5x5=25 for the right hand side It works.
  • 6.
  • 7. http://www.wiziq.com/seena Now use Excel / Calculator to find 995 x 995 It is 99x100 on LHS 5x5 on RHS Ditto for 9995 x 9995 = 999 000 25 This means, write the number of 9s, then write the same number of 0s and write 25 here 9999 9999 5 x 9999 9999 5 = 9999 9999 0000 0000 25