Level 3
There are 3 boxes.
The total mass of Box A and Box B is 160 kg.
The total mass of Box B and Box C is 200 kg.
The total mass of Box C and Box A is 180 kg.
Find the total mass of Box A, Box B and Box C.
Level 2
Numbers 1 to 100 were written on a piece of paper in 4 rows. The piece of paper was accidentally burnt and only the part shown was left. Which row was the number 69 in?
Level 2
Numbers 1 to 100 were written on a piece of paper in 4 rows. The piece of paper was accidentally burnt and only the part shown was left. Which row was the number 69 in?