Difficulty ★★★★☆ Popularity ★★★★★

2+3=8,

3+7=27,

4+5=32,

5+8=60,

6+7=72,

7+8=??

Solve it?

Difficulty ★★☆☆☆ Popularity ★★★★★

Henry has been caught stealing cattle, and is brought into town for justice. The judge is his ex-wife Gretchen, who wants to show him some sympathy, but the law clearly calls for two shots to be taken at Henry from close range. To make things a little better for Henry, Gretchen tells him she will place two bullets into a six-chambered revolver in successive order. She will spin the chamber, close it, and take one shot. If Henry is still alive, she will then either take another shot, or spin the chamber again before shooting.

Henry is a bit incredulous that his own ex-wife would carry out the punishment, and a bit sad that she was always such a rule follower. He steels himself as Gretchen loads the chambers, spins the revolver, and pulls the trigger. Whew! It was blank. Then Gretchen asks, 'Do you want me to pull the trigger again, or should I spin the chamber a second time before pulling the trigger?'

What should Henry choose?

Difficulty ★★★☆☆ Popularity ★★★★☆

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

Difficulty ★★☆☆☆ Popularity ★★★★☆

Right now Mum is 21 years older then her child In 6 years her child will be 5 times younger than she. Where is daddy?

Difficulty ★★★☆☆ Popularity ★★★★☆

A professor thinks of two consecutive numbers between 1 and 10.

'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.

B: Neither do I know your number.

A: Now I know.

There are four solution for this.What are they ??

Difficulty ★★★☆☆ Popularity ★★★★☆

A man wanted to get into his work building, but he had forgotten his code. However, he did remember five clues. These are what those clues were:

The fifth number plus the third number equals fourteen.

The fourth number is one more than the second number.

The first number is one less than twice the second number.

The second number plus the third number equals ten.

The sum of all five numbers is 30.

What were the five numbers and in what order?

Difficulty ★★★☆☆ Popularity ★★★☆☆

5+3+2 = 151022

9+2+4 = 183652

8+6+3 = 482466

5+4+5 = 202541

THEN ;

7+2+5 =

Difficulty ★★★☆☆ Popularity ★★★☆☆

A number with an interesting property:

When I divide it by 2, the remainder is 1.

When I divide it by 3, the remainder is 2.

When I divide it by 4, the remainder is 3.

When I divide it by 5, the remainder is 4.

When I divide it by 6, the remainder is 5.

When I divide it by 7, the remainder is 6.

When I divide it by 8, the remainder is 7.

When I divide it by 9, the remainder is 8.

When I divide it by 10, the remainder is 9.

It's not a small number, but it's not really big, either.

When I looked for a smaller number with this property I couldn't find one.

Can you find it?

Difficulty ★☆☆☆☆ Popularity ★★★☆☆

A boy and a girl are talking.

'I am a boy' - said the child with black hair.

'I am a girl' - said the child with white hair.

At least one of them lied. Who is the boy and who is the girl?

Difficulty ★★☆☆☆ Popularity ★★★☆☆

Replace the 'X' by any mathematical symbol to make the expression equal to 99.

18 X 12 X 2 X 3 = 111

Last Updated:2011-08-20