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# 5 Practice Problem for AFCAT CDS NDA Exam: Topic Arithmetic

Arithmetic is a branch of mathematics that consists of the study of numbers, especially the properties of the traditional operations between themâ€”addition, subtraction, multiplication and division, In this article we...

ArithmeticÂ is a branch of mathematics that consists of the study of numbers, especially the properties of the traditional operations between themâ€”addition, subtraction, multiplication and division, In this article we will shareÂ 5 Practice Problem for AFCAT CDS NDA Exam: Topic Arithmetic.

## 5 Practice Problem for AFCAT CDS NDA Exam: Topic Arithmetic

Q.Â The set of natural number is closed under

II.Â Â  Â  Subtraction
III.Â Â  Â Multiplication
IV.Â Â  Â Division

Which of the above is/are correct?

• Only I
• I and III
• I, II and III
• III and IV

Q.Â Consider the following statements

I.Â  Â Â  Every integer is a rational number
II.Â Â  Â Every rational number is a real number

Which of the above statements is/are correct?

• Only I
• Only II
• Both I and II
• Neither I nor II

Q.Â Which of the following is neither a prime number nor a composite number?

• 1
• 2
• 3
• none

Q.Â Consider the following statements

I.Â Â Â Â  If n is a prime number greater than 5,thenÂ Â is divisible by 2400
II .Â Â  Every square number is of the form 5n or (5n – 1) or (5n + 1), where n is a whole number?

Which of the above statement is/or correct?

• Only I
• Only II
• Both I and II
• Neither I nor II

Q.Â The pair of numbers which are relatively prime to each other is

• (68,85)
• (65,91)
• (92,85)
• (102,153)