Maths Monday

Question 1: A bat and a ball cost £11. The bat costs £10 more than the ball. How much does the ball cost?
Question 2: At a gathering of dogs and their owners, I counted 43 heads and 142 legs. How many dogs are there? And how many human owners?
Question 3: Harry Kane got a 10% pay rise for 1 month and then a 10% pay cut the next month. Did he get the same salary as before, an increase in salary or a less than before?