There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

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?

Replace the question mark with the correct number to complete the series, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 —–: 187
15921 —–: 153
17561 —–: 139
13734 —–: ???

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

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