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9²= ?
99²= ?
999²= ?
9999²= ?
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*Two short tricks for competitive exams
✓Calculate the Number of squares
✓1²+2²+3²+4²......................=?
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For many more short tricks and Logic building
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Math tricks for Competitive exams
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# # Number of Zeroes in End # #
Please note
In example 1*2*3........99
99/5=19,. 19/5 =3. => 19+3=22
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Another very handy short square trick for mind calculation
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15/04/2020
https://www.youtube.com/channel/UCMH1TZuCGYh2SZRrv_oIW6Q
Solve the puzzle::(Hint ::Box 1 =3.5)