What is common among 11, 69, and 88?

The more of this there is, the less you see. What is it?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

Can you tell a 3D object that has just two surfaces?

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

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

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

In which direction should the missing arrow point?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?