3 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
8 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
10 The value of $\sqrt{0.01}+\sqrt{0.81}+\sqrt{1.21}+\sqrt{0.0009}$ is: A) 2.13 B) 2.23 C) 2.02 D) 3.01
11 By what least number 4320 be multiplied to obtain a number which is a perfect cube ? A) 40 B) 50 C) 60 D) 70
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 If $\sqrt{2}$ = 1.414 ,the square root of $\frac{\sqrt{2}-1}{\sqrt{2}+1}$ is nearest to : A) 0.172 B) 0.414 C) 0.586 D) 1.414