10 Important mathematical operation for competitive test
Trick for Multiplying by 11 β‘
β Quickly multiply any two-digit number by 11
π Example: 53 Γ 11
Split the number: 5 _ 3
Add the digits in between: 5 (5+3) 3 β 583
So, 53 Γ 11 = 583 instantly! π
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