Can you place six X (crosses) in below board without making three in a row in any way ?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

What does this rebus means ?

PROG WORKRESS

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

When is the top of a mountain similar to a savings account?

How many triangles are there on the puzzle below?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

What is full of holes but still holds water?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?