Quantitative Aptitude - Arithmetic Ability Questions

If sinC - sinD = x, then value of x is

What will be the net discount (in %) of two successive discounts of 15% and 35%?

15% of a number, when added to 30% of another, gives 24% of the sum of the two numbers. The bigger number is 4 more than the smaller one. What are the numbers?

If 3x= 4y= 12, then z is equal to

The lengths of the diagonals of a rhombus are 8 cm and 6 cm. The area of rhombus is:

The sum of the ages of husband and wife at present is 100. Ten years ago the ratio of their ages was 9:7. What is the age of the husband?

In what ratio sugar of Rs 38 per kg and Rs 30 per kg be mixed with each other so that on selling mixture at Rs 35.2 per kg there will be a profit of 10%?

If a = √2 + 1, b = √2 - 1 then the value of 1a+1+1b+1 ?