Grade 6 Playing with Numbers Worksheets - CoolGyan Class 6 Maths Playing with Numbers True (T) or False (F) 1. The sum of three odd numbers is even. 2. The sum of two odd numbers and one even number is even. 3. The product of three odd numbers is odd. 4. If an even number is divided by 2, the quotients is always odd. 5. All prime numbers are odd. 6. Prime numbers do not have any factors. 7.