Quantitative Aptitude - Arithmetic Ability Questions

If a number is reduced by 35%, then it becomes 416. By how much percent should the number be increased so that it become 876.8?

What is the area of the square, if the length of its diagonal is 13√2 units?

If ax - 4y = -6 has a slope of -3/2. What is the value of a?

Two pipes can fill a cistern in 28 and 21 hours respectively and an another pipe can empty 30 gallons of water per hour. All the three pipes working together can fill the empty cistern in 84 hours. What is the capacity (in gallons) of the cistern?

What is the reflection of the point (5 , -1) in the line y = 2?

What is the value of (tan60 - 1/3) ?

What is the distance between the points (4,­-8) and (­-2,0)?

The ages of A and B differ by 16 years. If 6 years ago, the elder one was 3 times as old as the younger one, find the present age of the younger between A and B?