Which two signs should be interchanged in the following equation to make it correct?
– 12 ÷ 4 + 8 x 2 = 11

Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation.
 21 * 3 * 36 * 2 * 23 = 68

If Q means ‘add to’, J means ‘multiply by’, T means ‘subtract from’ and K means ‘divide by’, then 26 K 2 Q 3 J 6 T 4 = ?   

The ratio of the present age of the two brothers is 1: 2. And 5 years ago this ratio was 1: 3. So what will be the ratio of their age after 5 years.

Which of the following symbols should be placed in the blank space in order to complete the given expression in such a manner that ‘X > I’ definitely true?
  A = R ≥ I ? T = N ≤ M = X

Which two numbers need to be interchanged to make the given equation correct?
96 x 6 - 8 ÷ 2 + 3 = 768

Select the correct combination of mathematical signs to replace ‘*’ signs and to balance the given equation:
96*2*20*2*174

If + means −, − means ×, × means ÷, and ÷ means +, what will be the value of the following expression?
 5 ÷ 5 + 5 – 10 × 10 = ?