Question
Product of two consecutive positive even numbers is 624.
Find the sum of the digits of the two numbers. ÂSolution
Let the numbers be ( 2n ) and ( (2n + 2) ) respectively. ATQ, ( 2n * (2n + 2) = 624 ) Or, ( n * (2n + 2) = 312 ) Or, ( 2n² + 2n = 312 ) Or, ( n² + n = 156 ) Or, ( n² + n - 156 = 0 ) Or, ( n² + 13n - 12n - 156 = 0 ) Or, ( n(n + 13) - 12(n + 13) = 0 ) Or, ( (n + 13)(n - 12) = 0 ) So, ( n = -13 ) or ( 12 ) So, ( n = 12 ) So, numbers are ( 24 ) and ( 26 ). Therefore, required sum = ( 2 + 4 + 2 + 6 = 14 )Â
In each sentence below four words have been printed in bold which are numbered (1), (2), (3) and (4) One of these words may be misspelt or inappropriat...
The following question contains three statements, one or more of which may not be grammatically correct. You are required to identify the incorrect sta...
Select the phrase from the options below that should replace the underlined phrase in the sentence to make it grammatically and contextually correct. I...
In each sentence below four words have been printed in bold which are numbered (1), (2), (3) and (4) One of these words may be misspelt or inappropriat...
 Select the option that contains all correctly spelt  Â
In terms of technology and performance, Indian missile systems are compared with any other system in the worlds.
...Select the phrase from the options below that should replace the underlined phrase in the sentence to make it grammatically and contextually correct. I...
P referably, the ‘Holocaust’ law has strike a major convention with international reverberations.
...Its contention that artists and scholars would be exempt from the restrictions has not assuaged critics , who are challenging assaults on freedom...
Following are two sentences with four emboldened words in each. The words may or may not be In their correct sequence. There are options with possible ...
