The ratio of incomes of P and Q is 5 : 3. Ratio of income of Q and R is 5 : 2. If one-fourth of P’s income is Rs 500 more than the R’s income, then what is the income (in Rs) of Q?

If ab-1b=cb-1c=ac-1a, then ac+ba+cb

....... produces a usable form of energy for the cell.

______ is a particular area from which all the voters living there choose their representatives.

 If 3@7 = 20, 8@1 = 18 and 6@5 = 22, then find the value of 4@4 = ?

A flock of migrating geese flies 20 km East, then turns South and flies 50 km, then turns East and flies 40 km, and turns to its left and flies 50 km. Where is the flock now with reference to its starting position?

The ratio of Mohit’s and Sunil’s age at present is 7 : 9. Mohit is 4 years younger than Sunil. What will be the ratio of Mohit’s age and Sunil’s age after 6 years?

In the following question, select the missing number from the given series.

119, 121, 124, 128, ?, 139