mscroggs.co.uk
mscroggs.co.uk

subscribe

Sunday Afternoon Maths VII

Posted on 2014-04-06

Reverse bases

Find two digits $$a$$ and $$b$$ such that $$ab$$ in base 10 is equal to $$ba$$ in base 4.
Find two digits $$c$$ and $$d$$ such that $$cd$$ in base 10 is equal to $$dc$$ in base 7.
Find two digits $$e$$ and $$f$$ such that $$ef$$ in base 9 is equal to $$fe$$ in base 5.
Tags: numbers, bases

Ninety nine

In a 'ninety nine' shop, all items cost a number of pounds and 99 pence. Susanna spent £65.76. How many items did she buy?
Tags: numbers, money
If you enjoyed these puzzles, check out Advent calendar 2019,
puzzles about shape, or a random puzzle.

Archive

Show me a random puzzle
▼ show ▼