How many times can you subtract the number two from the number fifty?

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?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What does the below image rebus riddle means ?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?