In a school, the bell is rung once after each half an hour. The school starts at 8:00 a.m. and closes at 1: 30 p.m. The bell is rung 3 times continuously, at the time of beginning, at the time of lunch break at 10:00 and 10:30 a.m. and at the end. How many times is the bell rung every day? 

If “*” denotes “added to”, “&” denotes “divided by”, “@” denotes “multiplied by” and “%” denotes “subtracted from”, then
399 & 19 @ 21 % 41 * 100 =?

If “@” denotes “added to”, “#” denotes “multiplied by”, “®” denotes “divided by” and “%” denotes “subtracted from”, then which of the following equation is true?

The weights of 4 boxes are 30, 40, 50 and 80 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?

The sum of the ages of Arjun and his daughter is 48. The average of the ages of Arjun, his daughter and his son is 25. What is the age of Arjun’s son?

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

which of the following meanings of the arithmetical signs will yield the value ' zero ' for the expression given below?
200x100 + 300 x 200 10÷2 + 40

If ‘+’ stands for division, ÷ stands for multiplication, multiplication stands for addition; then which one of the following equation is correct?