10ticks Friday Puzzle

About us

Welcome to Ian’s Friday Puzzle! Dust off those Friday cobwebs with a little manipulation of the old grey matter. Perplexing puzzles, logical, illogical, and sometimes just plain stupid. Be prepared to be bewildered, befuddled and bedazzled!

See the latest Friday Puzzle below and look at all the past puzzles. Get the Friday Puzzle straight to your phone, follow us on Twitter. The first 5 correct answers join our Hall of Fame!

This week's Friday Puzzle

What is the smallest number of transparent square sheets of paper that can be placed over one another to form the pattern shown?

Square grid

Show answer

Friday Puzzle (09/06/2017)

If Benny is three times as old as Barney will be when Bernie is as old as Benny is now, who is the second oldest?

How old could Bernie, Barney and Benny be?

Show answer

Friday Puzzle (02/06/2017)

A2473B is a six-digit number in which A and B are single digits.

The number is divisible by 72, each of the six digits is

different and there are no zeroes.

What are the value of A and B?

Show answer

Friday Puzzle (26/05/2017)

Let N be the product of the first eleven positive integers.

If  N10x   is an integer, what is the maximum possible value of x?

 

Show answer

Friday Puzzle (19/05/2017)

In the diagram, how many degrees in total are the four marked angles, in terms of a and b?

angles

Show answer

Friday Puzzle (12/05/2017)

It takes 3 seconds to blow up a perfectly spherical balloon so it has a diameter of 6 inches.

Betty wants it bigger, so keep blowing.

How much longer will it take to blow up the balloon from a diameter of 6 inches to a diameter of 12 inches?

Note: the rate of air input is constant and no other external factors affect the balloon.

Show answer

Friday Puzzle (05/05/2017)

The length of a rectangle is 2/5 the perimeter of the rectangle.

What fraction of the rectangle’s length is the width?

Show answer

Friday Puzzle (28/04/2017)

A man’s age, when the digits are reversed, is the same as his daughter’s age.

The sum of their ages is 99 and the difference between their ages is a cubic number.

Find the ages of the man and his daughter.

Show answer

Friday Puzzle (21/04/2017)

An uncancelled fraction is equal to 1/2. Its numerator is reduced by 2 and its denominator increased by 2 so the fraction is now worth 1/3. What was the original fraction?

Show answer

Friday Puzzle (07/04/2017)

153 is a 3-digit number where the sum of the cubes of the digits is equal to the number.
13 + 53 + 33 = 153

Find another 3-digit number that has this property.
(There are 3 more!)

Show answer
10ticks UK Website 10ticks Australia Website 10ticks Malaysia Website 10ticks South Africa Website 10ticks India Website

All contents ©Fisher Educational Ltd 2002. All rights reserved. 10ticks.co.uk is the trading name and Registered trade mark of Fisher Educational Ltd. Registered in England No. 3668099