Tag: division trick

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Multiple choice maths multiply and divide division trick division division of numbers

$\frac {171\tfrac {3}{4}\times 171\tfrac {3}{4}-91\tfrac {3}{4}\times 91\tfrac {3}{4}}{171\tfrac {3}{4}+91\tfrac {3}{4}}$ is equal to

  1. $263\frac {1}{2}$
  2. $90\frac {1}{4}$
  3. $80$
  4. $80\frac {3}{4}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If $a=171\frac {3}{4}, b=91\frac {3}{4}$, then given expression is


$\dfrac {a^2-b^2}{a+b}=\dfrac {(a+b)(a-b)}{(a + b)}=a-b=171\frac {3}{4}-91\frac {3}{4}=80$

Multiple choice maths ways to multiply and divide division trick division multiply and divide

238 $\div$ 238 is ________

  1. $0$
  2. $238$
  3. $28$
  4. $1$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The number divided by itself and we get $1$ as quotient except $0$


This is not valid for $0$

Now as per the question 
the number $238$ is divided by itself

$238 \div 238 = \dfrac{238}{238} =1$

So , option $D$ is correct