How much more is the product of 18 and 5 than the sum of 37 and 45?

(a)  

What is the least common multiple of 3, 12 and 15?

(a)  

A rectangle is 9 cm long and 8 cm wide. What is the perimeter of the rectangle?

(a)  

What is the sum of all prime numbers between 31 and 50?

(a)  

What is the remainder when 349 is divided by 6?

(a)