Use only the 1, 5 and 0 keys on a calculator to make given totals.
Estimate or calculate then put the large numbers in order of size.
How many breaths have you taken in your lifetime?
Some keys are missing from this calculator. Just how useful is it?
A game for two players requiring a calculator and thinking skills.
A game in which players take turns to add a single-digit number to what is already in the calculator. The winner is the player who makes the display show 30.
Questions about the Small LEDs used to make up the digits on a calculator display.
How old is a person if when her age is divided by certain numbers, the calculator display ending are as shown.
Find out which of the calculator keys is faulty from the given information. A mathematical puzzle requiring good problem solving strategies.
An activity involving a broken calculator which is missing the four button. Can you evaluate the given expressions without using the four?
Find fractions between two given values.
Divide one whole number by another on your calculator. If the answer has one digit repeated but no other digits you have a Noodlewhack.
Find other numbers that can be changed to 1 on a calculator using only the 4 key and any operation.
Use your calculator to find which whole number divided by another whole number gives a recurring decimal.
Find a calculation for the current year which uses all of the digits 1 to 9.
An activity involving a calculator which is missing the six button. Can you evaluate the given expressions without using the six?
Use just six calculator keys to make a total of 20. In how many different ways can it be done?
Beginning with 100 on your calculator, what is the largest and smallest totals you can end up with after travelling through each of the possible routes.
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An interactive online activity requiring logical thinking and a certain amount of luck. Numbers 1 to 6 are presented randomly and are to be used to produce two 2-digit numbers. Can you ensure that the first number is greater than the second?
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