If 21x = 79x, what is the value of x?

A bridge is about to collapse. There are four people P, Q, R and S on one of the sides. Before the bridge collapses, they want to cross it. Now since the bridge is too weak, it can only stand the weight of two people at a time. Also, it is night time and nothing is visible. They have just one torch with them.

Now P takes one minute to cross the bridge, Q takes two minutes to cross, R takes five minutes to cross and S takes ten minutes to cross.

The bridge will collapse in seventeen minutes. How will they be able to cross the bridge before it collapses?

What does below rebus means ?

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

What is next number in the pattern below:

131 517 192 123 ?

Can you find out the total number of triangles in the given figure?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Count the number of lines in the image below ?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?