Topic: Irrational Numbers

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Answers
$1: 7,8$
$2: 9,10$
$3: 16,17$
$4: -2,-1$
$5: 5,6$
$6: 7,8$
$7: 3\sqrt{5}$
$8: 2\sqrt{6}$
$9: \sqrt{22}$
$10: 9$
$11: 10\sqrt{5}$
$12: 4$
$13: 5\sqrt{11}$
$14: -6\sqrt{5}$
$15: 9\sqrt{2}$
$16: mn$
$17: t^2-t$
$18: (b)$
$19: (a)$
$20: (b)$
$21: (d)$
$22: (c)$
$23: (c)$
$24: (a)$
$25: (a)$
$26: (b)$