Question
'A' spends 75% of his income,
while 'K' spends 80% of his income. Both of them save ₹7,500 each. The income of 'S' is one-third of the combined income of 'A' and 'K'. If 'S' spends 7/9 of his income, calculate his savings.Solution
ATQ,
Income of A = (7,500/0.25) = Rs. 30,000 Income of K = (7,500/0.2) = Rs. 37,500 Income of S = (1/3) × (30,000 + 37,500) = Rs. 22,500 Therefore, savings of S = (2/9) × 22,500 = Rs. 5,000
Given that (3a + 7b = 54) and (ab = 24), determine the value of (9a2 + 49b2).
The certain sum amounts to Rs11313.5 in 2(1/2) years at 12% p.a., interest compounded 10 months. The sum (in Rs) is:
Find the number of zeroes in 18 × 125 × 20 × 32.
If (2a + b)/(3b - 2b) = 13/2 then 'b' is what percent of 'a'?

= ?If (a + b) = 17 and (a2 + b2) = 145, then find the value of (a × b).
If x² + y² + z² = xy + yz + zy (x≠0), then the value of (5x+3y-4z)/2x is
when x =4 and y =-6 then find the value of 27x³ +58x²y +31xy² +8y³?
What will come in the place of question mark (?) in the given expression?
?2 = (392 × 224) ÷ (112 × 28) + 62