21. Write the Pythagorean triplet whose one number is 16 . 22. The interior angle of regular polygon is 156 . Find the number of sides. 23. Solve $$ \left(-\frac{7}{18} imes \frac{15}{-7} ight)-\left(1 imes \frac{1}{4} ight)+\left(\frac{1}{2} imes \frac{1}{4} ight) $$ 24. Rithwik draws a ball from a bag that contains white and yellow balls. The probability of choosing a white ball is $$ 2 / 9 $$. If the total number of balls in the bag is 36 , find the number of yellow balls. 25. Find the following product $$ \left(y+\frac{2}{7} y^{2} ight)\left(7 y-y^{2} ight) $$

Question

21. Write the Pythagorean triplet whose one number is 16 . 22. The interior angle of regular polygon is 156 . Find the number of sides. 23. Solve $$ \left(-\frac{7}{18} 	imes \frac{15}{-7}ight)-\left(1 	imes \frac{1}{4}ight)+\left(\frac{1}{2} 	imes \frac{1}{4}ight) $$ 24. Rithwik draws a ball from a bag that contains white and yellow balls. The probability of choosing a white ball is $$ 2 / 9 $$. If the total number of balls in the bag is 36 , find the number of yellow balls. 25. Find the following product $$ \left(y+\frac{2}{7} y^{2}ight)\left(7 y-y^{2}ight) $$

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21. The Pythagorean triplet is (12, 16, 20). 22. The regular polygon has 15 sides. 23. The simplified expression is $$ \frac{17}{24} $$. 24. There are 28 yellow balls in the bag. 25. The product is $$ 5y^3 - y^4 $$.

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