List

Year 3 Working Systematically

The Third Dimension
problem
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The Third Dimension

Age
5 to 11
Challenge level
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Here are four cubes joined together. How many other arrangements of four cubes can you find? Can you draw them on dotty paper?

How many Times?
problem
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How many Times?

Age
7 to 11
Challenge level
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On a digital 24 hour clock, at certain times, all the digits are consecutive. How many times like this are there between midnight and 7 a.m.?
Square Corners
problem
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Square Corners

Age
7 to 11
Challenge level
filled star empty star empty star

What is the greatest number of counters you can place on the grid below without four of them lying at the corners of a square?

A Square of Numbers
problem
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A Square of Numbers

Age
7 to 11
Challenge level
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Can you put the numbers 1 to 8 into the circles so that the four calculations are correct?
A Mixed-up Clock
problem
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A Mixed-up Clock

Age
7 to 11
Challenge level
filled star empty star empty star

There is a clock-face where the numbers have become all mixed up. Can you find out where all the numbers have got to from these ten statements?

What's in the Box?
problem
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What's in the Box?

Age
7 to 11
Challenge level
filled star empty star empty star

This big box multiplies anything that goes inside it by the same number. If you know the numbers that come out, what multiplication might be going on in the box?

Magic Vs
problem
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Magic Vs

Age
7 to 11
Challenge level
filled star empty star empty star

Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?

Fifteen cards
problem
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Fifteen cards

Age
7 to 11
Challenge level
filled star empty star empty star
Can you use the information to find out which cards I have used?
Take three numbers
problem
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Take three numbers

Age
7 to 11
Challenge level
filled star empty star empty star

What happens when you add three numbers together? Will your answer be odd or even? How do you know?

Play to 37
problem
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Play to 37

Age
7 to 11
Challenge level
filled star empty star empty star
In this game for two players, the idea is to take it in turns to choose 1, 3, 5 or 7. The winner is the first to make the total 37.
Build it up
problem
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Build it up

Age
7 to 11
Challenge level
filled star empty star empty star
Can you find all the ways to get 15 at the top of this triangle of numbers? Many opportunities to work in different ways.
Consecutive Numbers
problem
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Consecutive Numbers

Age
7 to 14
Challenge level
filled star empty star empty star

An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.

Buying a Balloon
problem
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Buying a Balloon

Age
7 to 11
Challenge level
filled star empty star empty star
Lolla bought a balloon at the circus. She gave the clown six coins to pay for it. What could Lolla have paid for the balloon?
Wonky Watches
problem
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Wonky Watches

Age
7 to 11
Challenge level
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Stuart's watch loses two minutes every hour. Adam's watch gains one minute every hour. Use the information to work out what time (the real time) they arrived at the airport.

Amy's Dominoes
problem
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Amy's Dominoes

Age
7 to 11
Challenge level
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Amy has a box containing domino pieces but she does not think it is a complete set. Which of her domino pieces are missing?
Sealed Solution
problem
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Sealed Solution

Age
7 to 11
Challenge level
filled star filled star empty star
Ten cards are put into five envelopes so that there are two cards in each envelope. The sum of the numbers inside it is written on each envelope. What numbers could be inside the envelopes?
Got It
problem
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Got It

Age
7 to 14
Challenge level
filled star filled star empty star

A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.

Finding Fifteen
problem
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Finding Fifteen

Age
7 to 11
Challenge level
filled star filled star empty star
Tim had nine cards each with a different number from 1 to 9 on it. How could he have put them into three piles so that the total in each pile was 15?
How Much Did it Cost?
problem
Favourite

How Much Did it Cost?

Age
7 to 11
Challenge level
filled star filled star empty star

Use your logical-thinking skills to deduce how much Dan's crisps and ice-cream cost altogether.

Oh! Harry!
problem
Favourite

Oh! Harry!

Age
7 to 11
Challenge level
filled star filled star empty star
A group of children are using measuring cylinders but they lose the labels. Can you help relabel them?
This Pied Piper of Hamelin
problem
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This Pied Piper of Hamelin

Age
7 to 11
Challenge level
filled star filled star empty star

Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether!

Roll these Dice
problem
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Roll these Dice

Age
7 to 11
Challenge level
filled star filled star empty star

Roll two red dice and a green dice. Add the two numbers on the red dice and take away the number on the green. What are all the different possible answers?

Watch the clock
problem
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Watch the clock

Age
7 to 11
Challenge level
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During the third hour after midnight the hands on a clock point in the same direction (so one hand is over the top of the other). At what time, to the nearest second, does this happen?
5 on the clock
problem
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5 on the clock

Age
7 to 11
Challenge level
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On a digital clock showing 24 hour time, over a whole day, how many times does a 5 appear? Is it the same number for a 12 hour clock over a whole day?
Inky Cube
problem
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Inky Cube

Age
7 to 14
Challenge level
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This cube has ink on each face which leaves marks on paper as it is rolled. Can you work out what is on each face and the route it has taken?

Dice in a Corner
problem
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Dice in a Corner

Age
7 to 11
Challenge level
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How could you arrange at least two dice in a stack so that the total of the visible spots is 18?