*✅ Maths MCQs:* *1. If a + b = 10 and ab = 21, find the value of .* (a) 58 (b) 52 (c) 50 (d) 54 Answer: (b) 52 *2. What is the HCF of 36 and 48?* (a) 12 (b) 16 (c) 18 (d) 24 Answer: (a) 12 Explanation: Common factors of 36 and 48 are 1, 2, 3, 4, 6, and 12. The highest is 12. *3. A man can row 15 km downstream in 3 hours and 9 km upstream in 3 hours. What is the speed of the stream?* (a) 2 km/hr (b) 1 km/hr (c) 1.5 km/hr (d) 2.5 km/hr Answer: (b) 1 km/hr *4. What is the simple interest on ₹5000 at 10% per annum for 2 years?* (a) ₹1000 (b) ₹1050 (c) ₹1100 (d) ₹1200 Answer: (a) ₹1000 *5. If the ratio of two numbers is 3:5 and their sum is 72, what is the smaller number?* (a) 27 (b) 30 (c) 45 (d) 18 Answer: (a) 27 Explanation: Let the numbers be 3x and 5x. *6. The perimeter of a square is 40 cm. Find its area.* (a) 100 cm² (b) 64 cm² (c) 49 cm² (d) 81 cm² Answer: (b) 64 cm² *7. If and , find the value of .* (a) 48 (b) 53 (c) 54 (d) 50 Answer: (c) 54 *8. A train 150 m long is running at 45 km/hr. How much time will it take to cross a platform 100 m long?* (a) 10 seconds (b) 20 seconds (c) 25 seconds (d) 30 seconds Answer: (c) 20 seconds *9. Find the square root of 729.* (a) 27 (b) 25 (c) 29 (d) 21 Answer: (a) 27 *10. A shopkeeper sells an article at 20% profit. If the cost price is ₹500, find the selling price.* (a) ₹550 (b) ₹600 (c) ₹580 (d) ₹620 Answer: (b) ₹600