A farmer has 10 cows. If each cow gives 2 litres of milk, how many litres does he have in total?

A bird has 2 legs. How many legs do 7 birds have?

A spider has 8 legs. How many legs do 3 spiders have?

If 10 ants carry 1 crumb each, and 3 crumbs are lost, how many crumbs are left?

A cat catches 5 mice a day. How many mice will it catch in 4 days?

A dog buries 12 bones. He digs up 5. How many are still buried?

A group has 6 monkeys. Each monkey eats 3 bananas. How many bananas are eaten in total?

A bee visits 10 flowers in an hour. How many flowers will it visit in 3 hours?

If a lion eats 5 kg of meat per day, how much meat does it eat in 2 days?

A fish tank has 20 fish. Half of them are blue. How many are blue?