Do you like riddles with numbers? Here we have some number brain teasers you can try to solve. Can you solve these? These are hard number riddles with answers, but do not look at the answer until you have tried to solve them.
For a perfect breakfast, you want to boil an egg exactly 15 minutes. You hve two hourglasses – one for 7 minutes, another for 11.
How can you tell when the eggs are done?
Crossing the bridge
It is late at night and dark. A group of 4 friends, with just a flashlight, come to a river.
There is a narrow bridge, but it can only hold two people at a time.
They have one torch and, because it’s night, the torch has to be used when crossing the bridge.
Ann can cross the bridge in 1 minute, Bert in 2 minutes, Caroline in 5 minutes, and David in 8 minutes.
When two people cross the bridge together, they must move at the slower person’s pace.
They have a bus to catch so they have to get over the bridge in a maximum of 15 minutes.
How can they achieve this?
Age of the children
An insurance salesman walk up to a house and knocks on the door.
A woman answers, and he asks her how many children she has and how old they are.
She says I will give you a hint. If you multiply the 3 children’s ages, you get 36.
He says this is not enough information. So she gives a him second hint.
If you add up the children’s ages, the sum is the number on the house next door.
He goes next door and looks at the house number and says this is still not enough information.
So she says she’ll give him one last hint which is that her oldest of the 3 plays piano.
How old were the children?
Farm of wheat
Three brothers live on a farm. They agreed to buy more seeds.
Allan and Brad would go and Clint stayed home to look after the farm.
Brad bought 75 bags of wheat on the market while Allan bought 45 bags.
At home they split the sacks equally.
Clint, who stayed at home, had paid $ 1400 for his share of the wheat.
How much did Allan and Brad receive from the money that Clint had paid, given the equal distribution of the bags?