Level 2
Adam has some stickers.
He gives away equal number of stickers each day.
After 5 days,
he has 23 of the stickers left.
After another 7 days, he has 21 stickers left.
How many stickers does he have at first?
Level 3
A tank is 29 filled with water. Rachel poured in 8.3 litres of water and the tank is now 56 full. How much water can the tank hold if it is filled to the brim? Give your answer correct to 1 decimal place.