Short Problems

Quiz Questions

Age 11 to 14 Short Challenge Level:

Jack does a 20-question quiz. How many questions didn't he attempt?

Jenny's Logic

Age 11 to 14 Short Challenge Level:

Weekly Problem 52 - 2009
How did Jenny figure out that Tom's cards added to an even number?

Mini Kakuro

Age 11 to 14 Short Challenge Level:

The sum of each column and row in this grid give the totals as shown. What number goes in the starred square?

Newspaper Sheets

Age 11 to 14 Short Challenge Level:

From only the page numbers on one sheet of newspaper, can you work out how many sheets there are altogether?

Central Sum

Age 11 to 14 Short Challenge Level:

Can you find numbers between 100 and 999 that have a middle digit equal to the sum of the other two digits?

12345

Age 11 to 14 Short Challenge Level:

Weekly Problem 50 - 2011
Repeat a pattern of numbers to form a larger number. Can you find the sum of all the digits?

Digit Deletion

Age 11 to 14 Short Challenge Level:

Weekly Problem 14 - 2010
What is the largest number of digits that could be erased from this 1000-digit number, to get a surprising result?

Alberta's Age

Age 11 to 14 Short Challenge Level:

Alberta won't reveal her age. Can you work it out from these clues?

Double with 1 to 9

Age 11 to 14 Short Challenge Level:

Can you find a number and its double using the digits $1$ to $9$ only once each?