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. 

What will be the value of 16 +19 × 51 ÷ 153 – 12 changing the symbols given below?
× and ÷

If ‘P’ means ‘÷’ and ‘Q’ means ‘+’ and ‘R’ means ‘×’ then Find the value of 16 P 8 Q 9 R 12?

Select the correct set of symbols which will fit in the given equation 5 0 3 5 = 20 

In a party, if each person shakes hands with all the persons present in the party and the total handshakes will be 66 then the total persons in that party will be -

In the following question, by using which mathematical operators will the expression become correct?
30 ? 6 ? 4 ? 5 ? 4

Which two numbers should be interchanged to make the following equation correct?
7 – 8 ÷ 4 + 5 × 3 = 8 × 3 + 6 ÷ 2 – 3

Which two signs should be interchanged to make two given equation correct.
4 × 8 ÷ 16 – 4 + 6 – 3 + 2 = 32