23.Numbers

Question 1

What is the representation of the number ab?

Answer 1

ab = 10a + b

Question 2

What is the representation of the number abc?

Answer 2

abc = 100a + 10b + c

Question 3

What is the representation of the number abcd?

Answer 3

abcd = 1000a + 100b + 10c + d

Question 4

Define a natural number.

Answer 4

Counting numbers from 1 to infinity

Question 5

Define a whole number.

Answer 5

Natural numbers with 0 adjoined

Question 6

Define a prime number.

Answer 6

A number greater than 1 having only 1 and itself as factors

Question 7

Define an odd number.

Answer 7

Numbers not divisible by 2 or having an ending in 1, 3, 5, 7, or 9

Question 8

Define an even number.

Answer 8

Numbers divisible by 2 or having an ending in 0, 2, 4, 6, or 8

Question 9

Define a rational number.

Answer 9

Numbers that can be expressed in the form of p/q, where p and q are integers

Question 10

Define an irrational number.

Answer 10

Numbers that cannot be expressed in the form of p/q

Question 11

Define an integer.

Answer 11

Set of all whole numbers including negative natural numbers and zero

Question 12

What are co-prime numbers?

Answer 12

Numbers that have a highest common factor (HCF) of 1