Introduction and Value of Pi

Q. The approximate value of pi is .

1. 3.14
2. 3.59
3. 3.41
4. 3.68

Q.

Why is pi so important?

Q.

Question 68

State whether the statement is True or False.

Ratio of circumference of a circle to its radius is always $2\pi :1$

Q.

$\pi$ is the ratio of circumference to radius of the circle.

1. False

2. True

Q. π is the ratio of circumference of a circle to its __________.

1. area
2. radius²
3. diameter
4. radius

Q. Roy planted corn on $\frac{1}{5}$ of his land. If he planted $45$ acres of corn, how many acres of land does he have?

1. $90$
2. $112\frac{1}{2}$
3. $225$
4. $135$
5. $337\frac{1}{2}$

Q.

$2<3<\pi <5$ [Say true or false]

1. True

2. False

Q. The ratio of circumference to diameter of any circle is equal to

1. 3.141
2. 7.545
3. 7.454
4. 3.414

Q. Simplify the following:
$\left(i\right)2.3-[1.89-\{3.6-(2.7-\overline{0.8-0.03})\left\}\right]$
$\left(ii\right)4.5-\frac{1}{2}of(7.6-3.5)+2.3\times 4.05$

Q. Three men have 4 coats, 5 waistcoats and 6 caps. In how many ways can they wear them?

Q.

Approximate value of pi is:

1. 3.14

2. 3.22

3. 3.45

4. 3.55

Q.

$\pi$ is the ratio of circumference of a circle to ___.

1. its radius

2. its area

3. square of its radius

4. its diameter

Q.

$\pi$ is the ratio of circumference to __ of the circle.

Q. Which of the following is the nearest value of pi?

1. 3.24
2. 3.41
3. 22/7
4. 24/7

Q.

Which of the following are false?

$i.{\left(1\right)}^{2016}>{\left(1\right)}^{2014}$

$ii.{\left(1\right)}^{2016}>{\left(0\right)}^{2016}$

$iii.{\left(1\right)}^{2016}>{(-1)}^{2016}$

$iv.{(-1)}^{2014}>{(-1)}^{2015}$

1. iii and iv
2. i and iii
3. i, iii, and iv
4. i and ii

Q. The largest natural number by which the product of three consecutive even natural numbers is always divisible is

1. 48
2. 96
3. 6
4. 24

Q.

Which of the following number gives a more accurate value of π?

1. 16/5

2. 355/113

3. 22/7

4. 157/50