2 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
4 Find fhe least square number which is exactly divisible by 10, 12, I5 and 18. A) 800 B) 12000 C) 1000 D) 900
7 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
9 Find the value of $\sqrt{1\frac{9}{16} }$ A) $1\frac{1}{4}$ B) $3\frac{3}{5}$ C) $2\frac{1}{4}$ D) $\frac{1}{4}$
10 By what least number 4320 be multiplied to obtain a number which is a perfect cube ? A) 40 B) 50 C) 60 D) 70
12 Three- fifth of the square of a certain number is 126.15.What is the number? A) 14.5 B) 75.69 C) 145 D) 210.25
13 $\frac{\sqrt{7}+\sqrt{5}}{\sqrt{7}-\sqrt{5}}$ is equal to : A) 1 B) 2 C) $6-\sqrt{35}$ D) $6+\sqrt{35}$
14 A general wishes to draw up his 36581 soldiers in the form of solid square.After arranging them,he found that some of them are left over. How many are left? A) 65 B) 81 C) 100 D) None of these
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