Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

what does this below rebus represent identXQQQQQME

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

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?

Remove two matchsticks to make the below equation correct.

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?