If I denotes ‘÷’, J denotes ‘×’, K denotes ‘−’ and L denotes ‘+’, then what will come in place of ‘?’ in the following equation?
 42 L 18 K (7 J 4) L (21 I 3) J 9 L 22 = ?

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 12 * 24 * 4 * 2 * 60

By Interchanging the given two numbers which of the following equation will be not correct?
5 and 9

By interchanging the given two signs and numbers which of the following equation will be correct?
 + and –, 7 and 3

Select the correct combination of mathematical signs to replace the * signs and balance the given equation.
 21 * 4 * 156 * 13 * 11 = 83

Which of the following symbols should be inserted in place of question mark (?) respectively (in the same order from left to right) in order to complete the given expression in such a manner that ‘U > S’, ‘Q < T’ and ‘S ≤ N’ definitely holds true?
 U > T ? D ≥ S ? Q ? N

Which of the following interchange of numbers and mathematical signs would make the given equation correct?
72 ÷ 8 × 9 − 36 + 20 = 80

Select the correct combination of mathematical signs to replace the * signs and balance the given equation.
66 * 6 * 12 * 3 * 15 = 12