Number Thinking (3)( Week 40 Practice) 1. When a certain number is decreased by 20, the result is the same as if it was divided by 5. What is the number? 2. The sum of two whole numbers A and B is 755. The ones place value of number A is 7. If we delete the 7, then we get number B. What is number A? 3. The product of two whole numbers is 171 and their difference is 10. What is the sum of the two numbers? 4. If y = 5 − x2 and -4 ≤ x ≤ 6, what is the difference between the largest possible y value and smallest possible y value? 5. If a is a positive integer and b is a positive integer, which of the following statements must be true?
I. a2 + b2 − ab >0 II.a + b < 0 III. < 0 |