You need to arrange three 7 and mathematical symbols to form number 1?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

What is next number in the pattern below:

131 517 192 123 ?

Why do Chinese men eat more rice than Japanese men do ?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?