Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly

How can you tell a raw egg from a hard-boiled egg?

Can you count the number of lines in the below picture?

How can you make a TV, a bed, a dog, and a car liquid?

What is full of holes but still holds water?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

Find the next number in the sequence

1, 2, 6, 21, 88, __?