```
```1)The least perfect square, which is divisible by each of 21, 36 and 66 is:

A. 213444

B. 214344

C. 214434

D. 231444

**Answer:**A. 213444

**Explanation:**
L.C.M. of 21, 36, 66 = 2772.

Now, 2772 = 2 x 2 x 3 x 3 x 7 x 11

To make it a perfect square, it must be multiplied by 7 x 11.

So, required number = 2^{2} x 3^{2} x 72 x 11^{2} = 213444

```
```2) A group of students decided to collect as many paise from each member of group as is the number of members. If the total collection amounts to Rs. 59.29, the number of the member is the group is:

A. 57

B. 67

C. 77

D. 87

**Answer:**C. 77

**Explanation:**
collection = (59.29 x 100) = 5929

members = √5929 = 77.

```
```3) √0.0169 x ? = 1.3

A. 10

B. 100

C. 1000

D. None of these

**Answer:**B. 100

**Explanation:**
Let √0.0169 x x = 1.3.

Then, 0.0169x = (1.3)^{2} = 1.69

=>x =

1.69
0.0169

= 100
```
```6)
Find the value of√151

A) 12.459

B) 12.292

C) 13.591

D) None of these

**Answer:**B) 12.292

**Explanation:**