To celebrate Maths Week 2016 this October 15-23, we asked Claire Flynn, programme manager of Maths Week Ireland at Waterford Institute of Technology, to come up with a few fun teasers and puzzlers to get our brains ready for ‘sum’ magic maths action…
For KS1 pupils
1.Which one is the odd one out and why? Is there another one that could be the odd one out?
2.The minute hand on this clock is missing. What time do you think it is?
3. Rob spends £1 and buys six pens and pencils altogether. How many of each might he have bought?
For KS2 pupils
1. True or false: if you keep subtracting 4 from 497 you will get to zero? Explain your answer.
2. There are 12 squares of chocolate in a bar. Would you rather have three squares or one third?
3. When making pancakes you need 100 g of flour, two eggs and 300 ml of milk to serve eight people. What quantities of flour, milk and eggs would you need to serve four times as many people?
For mums & dads
1.What is the only number when written in words appears in alphabetical order?
2.Using the digit ‘8’ eight times and only addition can you make the number 1000?
3.A hotel contains 100 rooms and they are numbered from 1 to 100. How many 9s are used altogether?
Did you know your brain grows when you make a mistake?
Did you know that putting on socks is actually an example of Commutative Property, as the order is unimportant?
1.Any of the shapes can be the odd one out—it’s all about reasoning why!
2.The time is between 6:30 and 7 because the hour hand is over half way between 6 and 7.
3.Rob could have bought 4 pens and 2 pencils; 3 pens and 4 pencils; 2 pens and 6 pencils or 1 pen and 8 pencils.
1.False—497 is not a multiple of 4
2.One third of 12 is 4 squares which is more than 3 squares – we are assuming here children always want more chocolate.
3.400g of flour, 8 eggs and 1200ml (1 l 200 ml) of milk to serve 8 people.
Mums & Dads
2)888 + 88 + 8 + 8 + 8 = 1000
3)20: Just count the nines in the numbers: 9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99