Can you replace the question mark with the correct number?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

Prove that the below maths equation is true.

8 + 8 = 91

What is both possible and impossible at the same time?

Find the missing number in the sequence below:

Can you count the number of quadrilaterals in the picture below?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

Be active and find the killer in the picture Riddle below.

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What does this rebus puzzle means ?