Nilsa is working on a 60-minute test. there are 20 questions on the test. if it takes her 20 minutes to complete 12 0f the questions, what is the greatest amount of time on average she can spend on each of the remaining 8 questions?

In a box lenght 1m breadth 60 cm and height 40 cm small rectangular packets of dimension 5 cm into 8 cm into 10 cm are packed. how many such small packets can be packed in the big box?

What is the missing step in this proof ?

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.