3. Elementary Mathematics

Question: A does work in 32 days, B in 48 days. They work together for 8 days, then A leaves.

Question: Two trains of length 210m & 140m run at 80 km/h and 150 km/h in same direction. Time taken

Question: Petrol price increases by 85%. By what percent should consumption be reduced so expenditure increases by only 48%? (a)

Question: What is the cost price of an article sold for ₹1,566 with 8% profit? (a) ₹1,420 (b) ₹1,390 (c)

Question: Two numbers are in ratio 4 : 9. Mean proportional is 24. Find positive difference between numbers. (a) 30

Question: If at same rate of interest in 2 years, Simple Interest is ₹42 and Compound Interest is ₹51, then

Question: Mandar leaves ₹24700 between 11-yr Ketan and 12-yr Tushar at 8% CI until both reach 22 yrs and receive

Question: In an exam, 3 papers of Maths, 2 papers of English, 1 paper of Science of 100 marks each.

Question: A number is decreased by 15% and then increased by 20%. The number obtained is 78 more than the

Question: The LCM of 28, 60, 120 and 135 is: (a) 7626 (b) 7560 (c) 7608 (d) 7569 28, 60,