Ex 3.3, 3 (a) - Chapter 3 Class 6 Playing with Numbers
Last updated at April 16, 2024 by Teachoo
Chapter 3 Class 6 Playing with Numbers
Concept wise
- Factors and Multiples
- Perfect number
- Prime and Composite Numbers
- Sum of prime numbers
- Prime numbers from 1 to 100
- Divisibility Tests - Divisibility by 5, 10, 2
- Divisibility Tests - Divisibility by 4, 8
-
Divisibility Tests - Divisibility by 3, 6, 9
- Divisibility Tests - Divisibility by 11
- Divisibility Tests - All
- Common Multiples
- Common Factors
- More Divisibility Rules
- Factor Tree
- Prime Factorisation
- Highest Common Factor
- Lowest Common Multiple
- Statement questions on LCM
- Statement questions on HCF
Transcript
Ex 3.3, 3 Using divisibility tests, determine which of following numbers are divisible by 6: (a) 297144 To check divisibility by 6 we check that Number is divisible by 2 Number is divisible by 3 Divisibility by 2 Since 297144 ends with 4 It is divisible by 2 Divisibility by 3 Sum of the digits = 2 + 9 + 7 + 1 + 4 + 4 = 27 Since 27 is divisible by 3 So 297144 is divisible by 3 Since 297144 is divisible by both 2 and 3 ∴ It is divisible by 6.
