How do you go from 98 to 720 using just one letter?

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?

Can you write down eight eights so that they add up to one thousand?

Solve the mathematical equation in the picture below.

A cricket has 6 legs, a squirrel has 4 legs and a spider has 8 legs.

In a local zoo, it was found that the total number of legs is 612. Also, there are equal number of each of the above animals/insects.

Can you find out how many animals are there in the zoo?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Find out the missing number in the picture attached:

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?