EYS/KS1 problem:
Pirate Pete’s Treasure Chest
Pirate Pete’s treasure chest has a three-number combination lock, but he has forgotten the combination. He remembers that there’s a 3, a 5 and an 8, but not what order they go in.
How many possible combinations are there to try?
***Solution!***
There are six combinations possible.
358, 385, 538, 583, 835, 853
KS2 problem:
Sealed Solution!
*You may want to make the set of ten cards using some scrap paper*
A set of ten cards, each showing one of the digits from 0 to 9, is divided up between five envelopes so that there are two cards in each envelope. The sum of the two numbers inside it is written on each envelope:
What numbers could be inside the “8” envelope?
***Solution!***
Here are some possible combinations:
So the numbers which could be inside the 8 envelope were 0 & 8, 5 & 3 or 7 & 1.
Y2 Blog 