A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Spot 5 differences in two Christmas tree below:

I have Rs.50 and I spend it in the way as below.

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

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

What part of the chicken has the most feathers?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H