Question
A shopkeeper give 4 articles free on the purchase of
every 12 articles. He also allows a discount of 20% to customer and still earns 20% profit. Find the ratio of cost price to mark price of the article.Solution
Buy 12 get 4 free,% discount offered = [4/(12 + 4)] ×100 = 4/16×100 = 100/4 = 25% So final Offer(discount) = Buy 12 get 4 free + 20% discount = 25% discount +20% discount So net discount = a + b - ab/100 = 25 +20 – (25 × 20/100) = 45 – 5 = 40% Let MP = 100 SP = (100-40% discount on MRP ) = 100 -40 = 60 Profit = 20% = 1/5 So CP = 50 CP∶ MP = 50∶ 100 = 1∶ 2 Alternate Method 
- Evaluate: 210 ÷ 15 × 7 + 200 – 50% of 600
√ [? x 11 + (√ 1296)] = 16
8(3/4) + 5(1/6) – 4(3/4) = ?
 Simplify the given expression
[1.5 × 1.5 × 1.5 + 2.7 × 2.7 × 2.7 + 4.8 × 4.8 × 4.8 – 3 × 1.5 × 2.7 × 4.8] / [1.5 × 1.5 +2.7 × 2.7 ...
[490 of 7 - (13)2 of 5] - 1228 = ?
What will come in the place of question mark (?) in the given expression?
(40/25) X 80 - ? = 45% of 300 - 55Evaluate: 48 ÷ 4 × (5 + 1) − 3²
23 × 20 + ? = 182 + 92 + 82
7(3/6) of 534 + 262 = 61800 - ?
Simplify the following expression:
