John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

I am white when I am dirty, and black when I am clean. What am I?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

The centre of the third figure is empty. What digit should fit inside?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

John bought 150 chocolates but he misplaced some of them. His Father asked him how many chocolates were misplaced.
He gave the following answer to him:
If you count in pairs, one remains
If you count in threes, two remain
If you count in fours, three remain
If you count in fives, four remain
If you count in sixes, five remain
If you count in sevens, no chocolate remains.

Can you analyze the statements and tell us how many chocolates were lost?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?