Replace the question mark with the correct number in below Picture:

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

What is next number in the pattern below:

131 517 192 123 ?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

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

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

A maths symbol is hidden in the below Bar Graph. Can you decipher it?