3 If $\sqrt{3} = 1.732$, find the value of $\sqrt{196} -\frac{1}{2}\sqrt{48} - \sqrt{75}$ correct to 3 places of decimal. A) 3.254 B) 2.531 C) 1.523 D) 1.732
4 Simplify : $\sqrt{\left(12.1^{2}-8.1^{2}\right)\div \left(0.25^{2}+\left(0.25\right) \left(19.95\right)\right)}$ A) 4 B) 3.5 C) 2.45 D) 3.7
7 $\left( \sqrt{\frac{225}{729} } - \sqrt{\frac{25}{144} } \right) + \sqrt{\frac{16}{81} } = ?$ A) $\frac{4}{15} $ B) $\frac{5}{16} $ C) $\frac{5}{17} $ D) $\frac{7}{16} $
10 How many two-digit numbers satisfy this property : The last digit (unit's digit) of the square of the two-digit number is 8 ? A) 3 B) 2 C) 1 D) None of these
12 By what least number 4320 be multiplied to obtain a number which is a perfect cube ? A) 40 B) 50 C) 60 D) 70
13 For what value of * the statement $(\frac{*}{15})(\frac{*}{135})$ =1 is true? A) 15 B) 25 C) 35 D) 45
14 $\frac{\sqrt{7}+\sqrt{5}}{\sqrt{7}-\sqrt{5}}$ is equal to : A) 1 B) 2 C) $6-\sqrt{35}$ D) $6+\sqrt{35}$
15 $\frac{3+\sqrt{6}}{5\sqrt{3}-2\sqrt{12}-\sqrt{32}+\sqrt{50}}$ is equal to ? A) 3 B) $3\sqrt{2}$ C) 6 D) None of these
