Maths Week 2020
Maths Week has arrived!
Check back each day this week to stretch your brain with our daily riddle.
Beginner: How do you make the number 7 an even number without addition, subtraction, multiplication or division.
Answer: Drop the 's' from 'seven' to get 'even'
Expert: Two fathers and two sons sat down to eat eggs for breakfast. They ate exactly three eggs, each person had an egg. How is this possible?
Answer: Only three people had breakfast. One of the 'fathers' is also a grandfather. Therefore the other father is both a son and a father to the grandson. In other words, the one father is both a son and a father.
Beginner: How many times can you subtract the number 5 from 25?
Answer: Once, because after you subtract it's not 25 anymore.
Expert: A merchant can place 8 large boxes or 10 small boxes into a carton for shipping. In one shipment, he sent a total of 96 boxes. If there are more large boxes than small boxes, how many cartons did he ship?
Answer: 11 cartons total. 7 large boxes (7 x 8 = 56 boxes) and 4 small boxes (4 x 10 = 40 boxes) 11 total cartons and 96 boxes
Beginner: Can you write down eight eights so that they add up to one thousand?
Answer: 888 + 88 + 8 + 8 + 8 = 1000.
Expert: My twin lives at the reverse of my house number. The difference between our house numbers ends in two. What are the lowest possible numbers of our houses?
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Answer: The lowest possible numbers for our house are 19 and 91.
Beginner: I am four times as old as my daughter. In 20 years time I shall be twice as old as her. How old are we now?
Answer: I am 40 and my daughter is 10.
Expert: If a hen and a half lay an egg and a half in a day and a half, how many eggs will half a dozen hens lay in half a dozen days?
Answer: Two dozen. If you increase both the number of hens and the amount of time available four-fold, the number of eggs increases 16 times. 16 x 1.5 = 24.
Beginner: A sphere has three, a circle has two, and a point has zero. What is it?
Expert: A small number of cards has been lost from a complete pack. If I deal among four people, three cards remain. If I deal among three people, two remain and if I deal among five people, two cards remain. How many cards are there?
Answer:There are 47 cards.
Thank you to everyone who sent in their answers to the riddles and to all the children who had a go at them in class!
Help us raise money for the NSPCC by dressing up with numbers or as a Times Table Rock Star on Friday 7th February! Check back soon to see the photos...