हिंदी

State true or false for the following statement and justify your answer: 2 × 3 × 5 × 7 + 1 is a composite number

Advertisements
Advertisements

प्रश्न

State true or false for the following statement and justify your answer:

2 × 3 × 5 × 7 + 1 is a composite number

औचित्य
सत्य या असत्य
Advertisements

उत्तर

This statement is false.

Explanation:

2 × 3 × 5 × 7 = 210, so 2 × 3 × 5 × 7 + 1 = 211.

No prime ≤ `sqrt(211)` (primes 2, 3, 5, 7, 11, 13) divides 211, so 211 is prime. 

Hence, the statement is false.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 1: Real Numbers - EXERCISE 1.3 [पृष्ठ १.२५]

APPEARS IN

आर.डी. शर्मा Mathematics [English] Class 10
अध्याय 1 Real Numbers
EXERCISE 1.3 | Q 8. (ii) | पृष्ठ १.२५
Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×