If P means -, Q means +, R means x and  S means ÷ then what is the value of  8 R6S3Q5P9 

If 16 Δ 4= 64 and 216 @ 8=27 and what is the value of 8 Δ 5@ 4 =?

Select the correct set of symbols:
34  16  4  12  = 26

There are deer and peacocks in a zoo. By counting heads they are 80. And the number of their legs is 200. How many peacocks are there? 

If you write down all the numbers from 1 to 99, then how many times do you write 3?

Ashok's mother was 3 times as old as Ashok 5 years ago. After 5 years she will be twice as old as Ashok. How old is Ashok today? 

If 879=8, 625=1, 586=9, then 785=?

If ‘+’ means ‘-‘; ‘-‘ means ‘×’; ‘×’ means ‘÷’ and ‘÷’ means ‘+’, then
25×5÷30+8 – 2 =?