What is the perimeter of a rectangle with length 5 units and width 3 units?

What is the value of 5 x 8?

Sara had 12 pencils. She gave 4 pencils to her friend and then bought 8 more pencils. How many pencils does Sara have now?

If a bag contains 20 marbles, and 5 of them are red, what fraction of the marbles are red?

A recipe calls for 2 cups of flour. If Sophia wants to make half of the recipe, how many cups of flour should she use?

A toy store has 24 stuffed animals. If they sell 5 of them, how many stuffed animals are left?

A box of crayons contains 16 crayons. If Sarah takes 4 crayons and Alex takes 6 crayons, how many crayons are left in the box?