Cards marked with numbers 1 to 100 are placed in a box and mixed thoroughly. A card is drawn at random from the box. The probability that the selected card bears a perfect square number is:

1. $\Big(\dfrac{1}{10}\Big)$

2. $\Big(\dfrac{2}{25}\Big)$

3. $\Big(\dfrac{9}{100}\Big)$

4. $\Big(\dfrac{11}{100}\Big)$

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn bears a number which is a multiple of 3?

1. $\Big(\dfrac{1}{2}\Big)$

2. $\Big(\dfrac{2}{5}\Big)$

3. $\Big(\dfrac{3}{10}\Big)$

4. $\Big(\dfrac{3}{20}\Big)$

A number is chosen at random from the numbers −4, −3, −2, −1, 0, 1, 2, 3, 4. What is the probability that the square of this number is less than or equal to 2?

1. $\Big(\dfrac{1}{2}\Big)$

2. $\Big(\dfrac{1}{3}\Big)$

3. $\Big(\dfrac{4}{9}\Big)$

4. $\Big(\dfrac{5}{9}\Big)$

Choose the incorrect statement.
If a card is picked at random from cards numbered 1 to 16, then:

1. the probability that the drawn card bears a number which is a factor of 16 is $\Big(\dfrac{1}{4}\Big)$

2. the probability that the drawn card bears an odd composite number is $\Big(\dfrac{1}{8}\Big)$

3. the probability that the drawn card bears a number which is a multiple of both 2 and 3 is $\Big(\dfrac{1}{8}\Big)$

4. the probability that the drawn card bears a number which is both a perfect square and a perfect cube is $\Big(\dfrac{1}{16}\Big)$