If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

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

Find the next number in the series below

21 32 54 87 131 ?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

I can be cracked, made, told, and played. What am I?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

What runs around the whole yard without moving?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

What is more useful when it is broken?