Start learning 50% faster. Sign in now
Let John’s current age be 5x years and Mary’s current age be 3x years. According to the problem, five years ago: John's age = 5x - 5 Mary's age = 3x - 5 The sum of their ages five years ago was 38 years: (5x - 5) + (3x - 5) = 38 Simplifying the equation: 5x - 5 + 3x - 5 = 38 8x - 10 = 38 8x = 48 x = 6 Now, substituting x back to find their ages: John's age = 5x = 5(6) = 30 years Mary's age = 3x = 3(6) = 18 years
A sum of money becomes ₹4600 after 3 years and ₹5400 after 5 years at simple interest. What is the principal amount?
The following table shows the monthly rainfall in a city for the first six months of the year:
(28×17÷4) – (1040÷13) = ?
Quantity I: ‘X’ – For a number greater than one, the difference between the number and its reciprocal is equal to 40% of ...
If P(A ∪ B) = 0.75 and P(A ∩ B) = 0.3, then the value of P(Aᶜ) + P(Bᶜ) is:
Which Is the layer of a computer system between the hardware and the user program
A company produces two types of gadgets, Type X and Type Y. How many total gadgets does the company produce in a month?
Statements:
I: ...
Let sinA+ sinB = a and cosA+ cosB = b, then the value of a² + b² = ?
The following table shows the marks obtained by five students in three subjects: