Practice focused topic-wise MCQs with answers and explanations for quick revision and exam preparation.
Difficulty select karke sirf is topic ke focused MCQs practice karein. Score, timer aur explanations student-friendly flow me milenge.
Showing 581-590 of 600 questions.
B. (24) वर्ष(24) years
यदि आयु (r) और (s) हो तो (r-s=6) और (r+s+8=50)। हल करने पर (r=24) मिलता है। / Let the ages be (r) and (s), so (r-s=6) and (r+s+8=50). Solving gives (r=24).
Login to save your score, XP, coins and progress.
C. (105) रुपये(105) rupees
यदि कीमतें (x) और (y) हों तो (x+y=275) और (x-y=65)। घटाने से (2y=210), इसलिए सस्ता टिकट (105) रुपये है। / Let the prices be (x) and (y), so (x+y=275) and (x-y=65). Subtracting gives (2y=210), so the cheaper ticket is (105) rupees.
Login to save your score, XP, coins and progress.
If (3(x+y)+4(x-y)=59) and (5(x+y)-2(x-y)=37), what is the value of (x)?
C. (8)
मान लें (u=x+y) और (v=x-y)। (3u+4v=59), (5u-2v=37) से (u=9), (v=8), इसलिए \(x=\frac{17}{2}\)। / Let (u=x+y) and (v=x-y). Solving (3u+4v=59), (5u-2v=37) gives (u=9), (v=8), so \(x=\frac{17}{2}\).
Login to save your score, XP, coins and progress.
C. (3)
मान लें \(u=\frac{1}{x}\) और \(v=\frac{1}{y}\)। (3u+2v=13), (2u-v=3) हल करने पर \(u=\frac{19}{7}\) आता है। / Let \(u=\frac{1}{x}\) and \(v=\frac{1}{y}\). Solve (3u+2v=13), (2u-v=3) carefully before choosing.
Login to save your score, XP, coins and progress.
Solving (3(x-2)+2(y+1)=31) and (5(x-2)-2(y+1)=21), what is (x+y)?
D. (13)
मान लें (u=x-2) और (v=y+1)। (3u+2v=31), (5u-2v=21) से \(u=\frac{13}{2}\), \(v=\frac{23}{4}\), फिर \(x+y=\frac{53}{4}\)। / Let (u=x-2) and (v=y+1). Solving (3u+2v=31), (5u-2v=21) gives values to substitute back for (x+y).
Login to save your score, XP, coins and progress.
If (4(2x-y)+3(x+y)=53) and (2(2x-y)-5(x+y)=-17), what is the value of (y)?
B. (5)
मान लें (u=2x-y) और (v=x+y)। (4u+3v=53), (2u-5v=-17) से (u=7), \(v=\frac{25}{3}\), इसलिए \(y=\frac{29}{9}\)। / Let (u=2x-y) and (v=x+y). Solve the two equations first, then convert back to (x) and (y).
Login to save your score, XP, coins and progress.
Solving (2x+9y=61) and (5x-3y=14), what is the value of (x)?
D. (7)
दूसरे समीकरण को (3) से गुणा करने पर (15x-9y=42)। जोड़ने पर (17x=103), इसलिए भिन्न उत्तर की संभावना देखें। / Multiplying the second equation by (3) gives (15x-9y=42). Add and solve carefully because fractional answers are possible.
Login to save your score, XP, coins and progress.
If (6x-5y=8) and (9x+10y=83), what is the value of (x+y)?
D. (11)
पहले समीकरण को (2) से गुणा कर (12x-10y=16)। जोड़ने पर (21x=99), इसलिए पूरी जांच करें। / Multiply the first equation by (2) to eliminate (y). After finding (x), substitute back before evaluating (x+y).
Login to save your score, XP, coins and progress.
For (14x+5y=77) and (7x-5y=-7), what is the value of (y-x) in the solution?
A. (5)
जोड़ने पर (21x=70), इसलिए \(x=\frac{10}{3}\)। फिर \(y=\frac{14}{3}\), इसलिए \(y-x=\frac{4}{3}\)। / Adding gives (21x=70), so \(x=\frac{10}{3}\). Then \(y=\frac{14}{3}\), hence \(y-x=\frac{4}{3}\).
Login to save your score, XP, coins and progress.
If (12x-7y=9) and (4x+7y=39), what is the value of (2x-y)?
B. (3)
जोड़ने पर (16x=48), इसलिए (x=3)। दूसरे समीकरण से \(y=\frac{27}{7}\), अतः \(2x-y=\frac{15}{7}\)। / Adding gives (16x=48), so (x=3). From the second equation \(y=\frac{27}{7}\), hence \(2x-y=\frac{15}{7}\).
Login to save your score, XP, coins and progress.
Use Google login or mobile OTP. Admin can block users and control login providers.