Dot Patterns to Represent Perfect Squares

Q. The greatest number which can divide 1356, 1868 and 2764 leaving the same remainder 12 in each case, is the perfect square of:

1. 6
2. 7
3. 8
4. 9

Q.

Observe the rectangle given below

If we have to make a square by rearranging the dots, then what is the minimum number of dots that has to added?

1. 16

2. 4

3. 8

4. 2

Q.

Observe the rectangle given below

If we have to make a square by rearranging these dots, then what is the minimum number of dots that should be removed.

1. 6

2. 8

3. 4

4. 2

Q.

Observe the rectangle given below

If we have to make a square by rearranging these dots, then what is the minimum number of dots that should be removed?

1. 4

2. 1

3. 3

4. 2

Q.

If a number ends with $n$ zeroes, what is the number of trailing zeroes in the square of the number?

1. 4

2. 6

3. 3

4. 5