Q3.

In what ratio, sugar costing Rs. 60 per kg be mixed with sugar costing Rs. 42 per kg such that by selling the mixture at Rs. 56 per kg there is a gain of 12%?

Q4.

The value of \(\frac{{7 + 8 \times 8 \div 8\;of\;8 + 8 \div 8 \times 4\;of\;4}}{{4 \div 4\;of\;4 + 4 \times 4 \div 4 - 4 \div 4\;of\;2}}\) is:

Q5.

The sum of the digits of a two-digit number is 1/7 of the number. The units digit is 4 less than the tens digit. If the number obtained on reversing its digits is divided by 7, the remainder will be: