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

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

The ratio of the number of girls to the number of boys in a town is 90 %. If the total number of boys and girls in the town is 190, how many girls are in the town? 

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 6 * 9 – 4 = 58 and 3 * 9 – 7 = 34, then in the expression A * 4 – 9 = 91, what is the value of 'A'?

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

The weights of 4 boxes are 70, 100, 20 and 40 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes and in a combination a box can be used only once.