What will come in place of x, if square of a number is calculated by short-cut method as shown below?

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Solution

The correct options are
B
2

C
1

8 x 9 = 72

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Similar questions

Q. Which number should come in place of

□

\frac{1}{7} + \frac{2}{7} + \frac{□}{7} = 1 \frac{3}{7}

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\frac{4}{9}

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\frac{□}{9}

= 2

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(A) Actual mean method

(B) Direct method

3, 4, 6, 7, 10

Calculate the mean of the distribution given below using the short cut method
$\begin{matrix} M a r k s & 11 - 20 & 21 - 30 & 31 - 40 & 41 - 50 & 51 - 60 & 61 - 70 & 71 - 80 N o . o f s t u d e n t s & 2 & 6 & 10 & 12 & 9 & 7 & 4 \end{matrix}$

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What will come in place of x, if square of a number is calculated by short-cut method as shown below?

The correct options are B 2 C 1 8 x 9 = 72

The correct options are
B
2

C
1

8 x 9 = 72