What is the word or phrase?

There are forty elephants and they have forty-fore heads. How can this be possible?

John, a 5-year-old boy, was really fond of the chocolates. He asked his Mother to give him some money to buy his favourite chocolates. His Mother gave him $45. He went to the shopkeeper and asked, "How much is one chocolate for?". The shopkeeper said $3 for one chocolate. Also, if you give me the wrappers of three chocolates, I will give you one for the exchange.
In total, how much chocolate could John eat?

who is silent in the parliament?

How many triangles are there in the picture below?

Find out the missing number in the picture attached:

A man dies of old age on his 25 birthday. How is this possible?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

Look at me. I can bring a smile to your face, A tear to your eye, Or even a thought to your mind. But, I can't be seen. What am I?

What does this mathematical rebus means ?