If it took eight men ten hours to build a wall, how long would it take four men to build it?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

I ask Joseph to pick any 5 cards out of a deck with no Jokers.

He can inspect then shuffle the deck before picking any five cards. He picks out 5 cards then hands them to me (Jack can't see any of this). I look at the cards and I pick 1 card out and give it back to Joseph. I then arrange the other four cards in a special way, and give those 4 cards all face down, and in a neat pile, to Jack.

Jack looks at the 4 cards i gave him, and says out loud which card Joseph is holding (suit and number). How?

The solution uses pure logic, not sleight of hand. All Jack needs to know is the order of the cards and what is on their face, nothing more.

Solve the equation in the image by looking at the pattern closely.

Which digit occurred maximum times between the number 1 and 1000?

What English word has three consecutive double letters?

Using eight eights and addition only, can you make 1000?

What does the below rebus puzzle mean?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

Why are all black people so quick ?