Question
When 135 is added to 3A7, the result is 4B2. 4B2 is
divisible by 3. What is the largest possible value of A?Solution
3A7 + 135 = 4B2 Clearly A+1+3 =B or A+4=B So possible values for A & B are: - A = 0, 1, 2, 3, 4, 5 & B = 4, 5, 6, 7, 8, 9 & 4B2 is exactly divisible by 3. Now, 4 + B + 2 = 6+B = multiple of 3 Therefore, B = 6 or 9 is only possible values and accordingly,  A = 2 or 5 is possible value for A, Hence largest possible value of A is 5.
In which form is iron ore primarily found in nature?
The reaction of an aldehyde with Tollens’ reagent results in:
Diamond is harder than graphite because of which of the following reason?
The process of converting a solid directly into its vapor is called:
The product of the equivalent weight and valency of an element equals its ______.
A soap bubble and a liquid drop both have same surface tension and radius, then which will have more excess pressure inside it?
The weakest of all fundamental forces is –
Which of the following cannot be cut by a knife?
The (O-H) bond in CH3OH is which type of bond?
Biofertilizers convert nitrogen to:
Relevant for Exams:
