BRAIN TEASERS
 enter your answer and press button OK

# Calculate the number 691

NUMBERMANIA: Calculate the number 691 using numbers [1, 2, 5, 6, 61, 110] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
The first user who solved this task is Sanja Šabović.
#brainteasers #math #numbermania
Register with your Google Account and start collecting points.
Check your ranking on list.

### Dog in Heat

A little girl asked her Mom, "Mom, may I take the dog for a walk around the block?
Mom replies, "No, because she is in heat."
"What's that mean?" asked the child.
"Go ask your father. I think he's in the garage."
The little girl goes to the garage and says, "Dad, may I take Belle for a walk around the block? I asked Mom, but she said the dog was in heat, and to come to you."
Dad said, "Bring Belle over here."
He took a rag, soaked it with gasoline, and scrubbed the dog's backside with it and said, "Okay, you can go now, but keep Belle on the leash and only go one time around the block." The little girl left, and returned a few minutes later with no dog on the leash.

The little girl said, "She ran out of gas about halfway down the block, so another dog is pushing her home."

Jokes of the day - Daily updated jokes. New jokes every day.
 Follow Brain Teasers on social networks

## Brain Teasers

puzzles, riddles, mathematical problems, mastermind, cinemania...

### Germain Henri Hess

Born 8 Aug 1802; died 13 Dec 1850 at age 48.Swiss-Russian chemist whose studies of heat in chemical reactions formed the foundation of thermochemistry. He formulated an empirical law, Hess's law of constant heat summation (1840), which states that the heat evolved or absorbed in a chemical process is the same whether the process takes place in one or in several steps. It is explained by thermodynamic theory, which holds that enthalpy is a state function. Chemists have made great use of the law of Hess in establishing the heats of formation of compounds which are not easily formed from their constituent elements. His early investigations concerned minerals and the natural gas found near Baku, and he also discovered the oxidation of sugars to yield saccharic acid.DSB gives dates as 8 Aug 1802 - 13 Dec 1850. EB gives 7 Aug 1802 - 30 Nov 1850.]
This site uses cookies to store information on your computer. Some are essential to help the site properly. Others give us insight into how the site is used and help us to optimize the user experience. See our privacy policy.