# Math

A bat and a ball cost $1.10. The bat costs one dollar more than the ball. How much does the ball cost?

# Math

I am as simple as a circle, worthless as a leader; but when I follow a group, their strength increases tenfold. By myself I'm practically nothing. What am I?

# Math

Double my number, I'm less than a score. Half of my number is less than four. Add one to my double when bakers are near. Days of the week are still greater, I fear.

# Math

Sally is 54 years old and her mother is 80, how many years ago was Sally's mother three times her age?