Level 1
John used 3 black tiles for every 5 white tiles on a floor. He used 63 black tiles. How many white tiles did he use?
2 m
Level 1
There are 40 pupils in a class. The pupils are divided into groups consisting of 3 boys and 5 girls in each group. How many boys are there in the class?
2 m
Level 2
If 200 g of salmon cost $6, how much will 2 kg of salmon cost?
2 m
Level 2
A cashier received $1932 for a month's work. She worked 12 hours a day and was paid $7 per hour. How many days did she work in that month?
2 m
Level 3
Study the number pattern.
What is the number in the 100th position?
4 m