what one word does the below rebus identifies?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Identify the 10 differences between the two given pictures.

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

What is the next number in this matchsticks series riddle?

In the image below, can you find the value of an angle(y)

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

What is the word or phrase?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?