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Class 9 › Mathematics › Chapter Number System

Q.1 What can the maximum number of digits be in the repeating block of digits in the decimal expansion of 1/17?

Class 9 • Mathematics • Chapter: Number System

Q.2 Express 0.99999…. in the form p/q. Are you surprised by your answer?

Class 9 • Mathematics • Chapter: Number System

Q.3 Express the following in the form p/q, where p and q are integers and q 0.

Class 9 • Mathematics • Chapter: Number System

Q.4 You know that 1/7 = 0.142857. Can you predict what the decimal expansions of 2/7, 3/7, 4/7, 5/7, and 6/7 are without actually doing the long division?

Class 9 • Mathematics • Chapter: Number System

Q.5 Write the following in decimal form and say what kind of decimal expansion each has:

Class 9 • Mathematics • Chapter: Number System

Q.6 State whether the following statements are true or false. Give reasons for your answers.

Class 9 • Mathematics • Chapter: Number System

Q.7 Find five rational numbers between 3/5 and 4/5.

Class 9 • Mathematics • Chapter: Number System

Q.8 Find six rational numbers between 3 and 4.

Class 9 • Mathematics • Chapter: Number System

Q.9 Is zero a rational number? Can you write it in the form p/q where p and q are integers and q ≠ 0?

Class 9 • Mathematics • Chapter: Number System