Which number will come in place of ' $M$ '?
$16$ $7$ $2$ $20$
$25$ $8$ $2$ $30$
$36$ $9$ $5$ $24$
$49$ $10$ $7$ $M$

21

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32

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40

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63

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Solution

The correct option is C $21$
$C_{4} = (C_{2} - C_{3}) \sqrt{C_{1}}$
In column 4
$= (10 - 7) \sqrt{49} = 3 \times 7 = 21$

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Similar questions

Marks	$0 - 4$	$5 - 9$	$10 - 14$	$15 - 19$	$20 - 24$	$25 - 29$	$30 - 34$	$35 - 39$
Frquency	$2$	$5$	$7$	$13$	$21$	$16$	$8$	$3$

Find

(i) (ii) (iii)

(iv) (v)

Use the distributivity of multiplication of rational numbers over their addition to simplify:

(i) $\frac{3}{5} \times (\frac{35}{24} + \frac{10}{1})$

(ii) $\frac{- 5}{4} \times (\frac{8}{5} + \frac{16}{5})$

(iii) $\frac{2}{7} \times (\frac{7}{16} - \frac{21}{4})$

(iv) $\frac{3}{4} \times (\frac{8}{9} - 40)$

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