Replace the question mark with the correct number in the below-given picture?

Rearrange the letters in "new door" to make one word.

Whats the next number in the below number sequence pattern.

Prove that twice of ten is the same as twice of eleven.

What has a ring but no finger?

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

Which is faster, Heat or Cold ? Explain.

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

Which number comes next in the number series?

2, 9, 30, 93, ?