Quantitative Aptitude - Arithmetic Ability Questions

A miner sells a diamond to a trader at a profit of 40% and the trader sells it to a customer at a profit of 25%. If the customer pays Rs 56 lakhs to buy the diamond, what had it cost the miner (in Rs lakhs)?

Rahul nd Raghav are 110 km apart from each other and they started horse-riding towards each other at same time at a speed of 20 kmph and 24 kmph. After how many hours of riding will they be a distance of 22 km?

Find the L.C.M of 4/5, 2/3 and 5/7.

What should come in place of question mark (?) in the following question? (You do not have to calculate the exact value.)

(√80.997 - √25.001) × (√120.98 + √16.02) = ?

If x2 + (1/x2) = 1, then what is the value of x48 + x42 + x36 + x30 + x24 + x18 + x12 + x6 + 1?

If 7x - (3/2) * (4x - 9) = 6.5, then the value of x is?

For an article the profit is 190% of the cost price. If the cost price increase by 10% but the selling price remains same, then profit is what percentage of selling price (approximately)?

A batsman makes a score of 81 runs in the 16th match and thus increases his average runs per match by 3. What is his average after the 16th match?