What number do you get when you multiply all of the numbers on a telephone's number pad?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

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

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

What does this rebus riddle means ?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

John and his team plan to rob a safe. They got just one chance to break the code else the local police will be informed. Below are clues:
A) Exactly one number is perfectly placed: 9 8 1
B) Everything is incorrect: 9 2 4
C) Two numbers are part of the code of the safe but are wrongly placed: 0 9 3
D) One number is part of the code of the safe but is wrongly placed: 1 4 7
E) One number is part of the code of the safe but is wrongly placed: 7 8 3

Can you tell a 3D object that has just two surfaces?

What happened when the wheel was invented?