Maritime Academy Trust

Maritime is a charitable education trust with schools across London and the South East.

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Maths Week 2020

Maths Week has arrived! 

Check back each day this week to stretch your brain with our daily riddle.

Monday's 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.


Tuesday's Riddle

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


Wednesday's Riddle

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?

Feel free to drop us an email at with your answer or CHECK BACK HERE TOMORROW!
Answer: The lowest possible numbers for our house are 19 and 91.


Thursday's Riddle

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. 


Friday's Riddle

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...