1. If a and b are positive integers such that a^2 - b^2 = 19, then value of a is ? 2.(256 ∗ 256-144 ∗ 144)/112 ? 3.If a = 11 and b = 9, then value of (a^2+b^2+ab)/(a^3 -b^3 ) 4.If p and q represent digits, what is the maximum possible value of q in the statement : 5p9 + 327 + 2q8 = 1114 5.7 is added to a certain number; the sum is multiplied by 5; the product is divided by 9 and 3 is subtracted from the quotient. Thus, if the remainder left is 12, what was the original number? 6.7 is added to a certain number; the sum is multiplied by 5; the product is divided by 9 and 3 is subtracted from the quotient. Thus, if the remainder left is 12, 7.what was the original number? The number formed from the last two digits (ones and tens) of the expression 𝟐 ^ 𝟏𝟐𝒏 - 𝟔 ^ 𝟒𝒏 , where n is any positive integer is 8.The largest number, which exctly divides the product of any four consecutive natural numbers, is 9.A 4-digit n...
Preparation for Competitive exams SSC RAILWAY