Question
If (x24 + 1)/x12 = 7, then
the value of (x72 + 1)/x36 isSolution
(x24 + 1)/x12 = 7 ⇒ x24/x12 + 1/x12 = 7 ⇒ x12 + 1/x12 = 7 ∴ (x72 + 1)/x36 = x72/x36 + 1/x36 = x36 + 1/x36 = (x12 + 1/x12 )3 – 3 × x12 × 1/x12 (x12 + 1/x12) ∵ (a + b)³ = a³ + b³ + 3ab (a + b) = 7³ - 3 × 7 = 343 – 21 = 322
Find average number of boys in school – C, D and E.
If some people shifted in wing B from wing E and number of people increased by 80% in wing B, then find how much percent people left wing E.
Find the ratio between the expenditure of C and the expenditure of D.
On April, if 5% of total cars available for sell remain unsold, then find the ratio of total number of cars available for sell on August to that on April.
Find the average number of platinum tickets sold in theatre B and D, if total number of tickets available in theatre B and D are 250 and 300 respectively.
The savings of D is approximately how much percent of the Income of B?
Number of chocolates purchased by Amit from shop A is what percent of the total number of chocolates purchased by Sumit from shop B and D together?
Read the information given below and answer the following questions.
Number of males working in department A is how much percent more than the number of females working in department D?
Total number of Children and Women visiting Audi 3 is 750. The difference between the total number of Men and Women visiting Audi 5 is 100. What is the ...
