Among 57 , 212 , 117 , 97 , 315 , 931 , identify the prime numbers.

We know that, a natural number greater than 1 , whose only factors are 1 and the number itself, are called prime numbers. Example: 2 , 3 , 5 , 7 , 11 , . . . The given numbers are 57 , 212 , 117 , 97 , 315 , 931 . Now, 57 = 1 × 3 × 19 212 = 1 × 2 × 2 × 53 117 = 1 × 3 × 3 × 13 97 = 1 × 97 315 = 1 × 3 × 3 × 5 × 7 931 = 1 × 7 × 7 × 19 Out of the given numbers, only 97 is a prime number. Hence, 97 is a prime number.

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Joy Of Mathematics 8>Chapter 6 - Playing with Numbers>Revision Time

S.N. Chhibber Solutions for Chapter: Playing with Numbers, Exercise 4: Revision Time

Author:S.N. Chhibber

S.N. Chhibber Mathematics Solutions for Exercise - S.N. Chhibber Solutions for Chapter: Playing with Numbers, Exercise 4: Revision Time

Attempt the practice questions on Chapter 6: Playing with Numbers, Exercise 4: Revision Time with hints and solutions to strengthen your understanding. Joy Of Mathematics 8 solutions are prepared by Experienced Embibe Experts.