BRAIN TEASERS

enter your answer and press button OK

What 5-digit number satisfies the following requirements?

What 5-digit number satisfies the following requirements? 1. No zeroes; 2. First two digits are the same; 3. Fourth digit is twice the first; 4. Last digit is twice the third; 5. Sum of all digits is 18

Correct answers: 127

The first user who solved this task is Djordje Timotijevic.

#brainteasers #math #riddles

Register with your Google Account and start collecting points.

Check your ranking on list.

Pete Lee: Making Love in a Car Wash

I was reading this article the other day, and it said, The perfect way to spice up your love life is to make love in a car wash. Let me tell you guys from experience -- no, it is not. Its also the perfect way to ruin a church fundraiser.

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...

Alfred Binet

Born 8 Jul 1857; died 18 Oct 1911 at age 54. French psychologist who was a pioneer in the field of intelligence testing of the normal mind. He took a different approach than most psychologists of his day: he was interested in the workings of the normal mind rather than the pathology of mental illness. He wanted to find a way to measure the ability to think and reason, apart from education in any particular field. In 1905 he developed a test in which he had children do tasks such as follow commands, copy patterns, name objects, and put things in order or arrange them properly. He gave the test to Paris schoolchildren and created a standard based on his data. From Binet's work, "IQ" (intelligence quotient), entered the vocabulary. The IQ is the ratio of "mental age" to chronological age, with 100 being average.[Although some sources give birthday as 11 Jul, both Enc. Brit. and Dict. of Sci. Biog. give born 8 Jul 1857.]

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.