What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Can you find out the total number of triangles in the given figure?

What goes up but never comes down?

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

What is the fastest way to double your money?

What is the next number in this matchsticks series riddle?

Can you solve this picture maths equation?