Vitorr classes

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...

1.The average price of 80 mobile phones is Rs.30,000. If the highest and lowest price mobile phones are sold out then the average price of remaining 78 mobile phones is Rs. 29,500. The cost of the highest mobile is Rs.80,000. The cost of lowest price mobile is? A. Rs. 18000 B. Rs. 15000 C. Rs. 19000 D. Can’t be determined E. None of these 2. In a Company the average income of all the employees is Rs. 20000 per month. Recently the company announced increment of Rs. 2000 per month for all the employees. The new average income of all the employees is? A. 22000 B. 24000 C. 28000 D. 26000 E. None of these Solution to all question in this video . Watch it   3. Pranav went to the bank at the speed of 60 kmph while returning for his home he covered the half of the distance at the speed of 10 kmph, but suddenly he realized that he was getting late so he increased the speed and reached the home by covering rest half of the distance at the speed of 30 kmph.The average speed of the Pr...