Explanation:

A wire that weight 24 kilogram is cut into two pieces so that one of these two pieces weigh 16 kilogram and is 34 meter long. If the weight of each piece is proportional to its length , how long is the other piece ? Correct Answer 17 meters Weight of the other peice = 24 - 16 = 8 kg Here,  weight ∝ length or,  (length/weight)second  = (length/weight)first or, (length/8)second  = (34/16)first So, length of the other peice = 34 / 16 × 8 =  17 meters

Explanation:

If x% of 40 is y then 10x = ? Correct Answer 25y Here,  x% of 40 = y or,  x/100 of 40 = y or,  x = y×100/40 or,  10x = 10×y×100/40 or,  10x = 25y

Explanation:

There ar 200 students in a class. 76% passed in Bangla and 54% passed in English . If 10% of the students failed in both the subjects then how many of them passed in both subjects ? Correct Answer 80 Passed in Bangla = 76% of 200 = 152 Passed in English = 54% of 200 = 108 Failed in both subjects = 10% of 200 = 20 Passed in atleast one subject = 200 - 20 = 180 Passed in both subjects = 152 + 108 - 180 = 80

Explanation:

A glass was filled with 10 liters of water and 0.01 liter of water evaporated every day during a 20-day period . What percent of the original amount of water evaporated during the period ? Correct Answer 2% Total water evaporated = 0.01×20 = 0.2 liter Percentage of evaporated water = 0.2 / 10 × 100% = 2%

Explanation:

If the price of a dress is TK. 200 that includes 15% VAT, then what is the amount of VAT ? Correct Answer TK. 26.09 Let the price excluding VAT be A. So,  A + 15% of A = 200 or,  A + 0.15A = 200 or,  1.15A = 200 or,  A =   200/1.15 = 173.91 TK So,  VAT = 200 - 173.91 =  26.09 TK

Explanation:

Noman sells pens for TK. 65.00 each. This price gives him a profit of 30 percent on the costs. What will be the new retail price of each pen if he cuts his profit to 10 percent of costs ? Correct Answer TK. 55.00 Let the cost price be A. Then, A + 30% of A = 65 or, A + 0.3A = 65 or,  1.3A = 65 or,  A = 65 / 1.3 = 50 TK. New retail price at 10% profit = 50 + 10% of 50 = 50 + 5 = 55 TK

Explanation:

OPEC is associated with the international trading of which of the following commodities ? Correct Answer Oil Kazuo Ishiguro won the Nobel Prize in Literature in 2017.

Explanation:

The name of the first central bank of the world is - Correct Answer Bank of England জাতিসংঘের বর্তমান মহাসচিব (নবম) পর্তুগালের নাগরিক অ্যান্টনিও গুতেব্রেস। ১ জানুয়ারি ২০১৭ তিনি দায়িত্ব গ্রহণ করেন।

Explanation:

A wholesaler bought 1200 pens for TK 18 each . He sold 60% of the pens for TK. 30 each and remaining for TK. 15 each. What was his average profit per pen ? Correct Answer TK. 6 Total cost = 1200×18 = 21600 TK. Revenue from 60% pens = (60% of 1200)×30 = 720×30 = 21600 TK Revenue from the rest of pens (40%) = (40% of 1200)×15 = 7200 TK Total revenue = 21600 + 7200 = 28800 TK Profit = 28800 - 21600 = 7200 TK. Profit per pen = 7200/1200 = 6 TK

Explanation:

When Mr. Sen imports some raw materials he has to pay 7% import duty on the portion of the total value of the item in excess of TK. 1000. If the amount of import duty he paid was TK. 87.50 then what was the value of the raw material that he imported ? Correct Answer TK.2,250 Let the value of the raw material in excess of Tk 1000 be T. Then,  7% of T = 87.5 or,  7/100 of T = 87.5 or,  T = 87.5×100/7 = 1250 TK So, value of the raw amterial = 1000 + 1250 =  2250 TK

Explanation:

f(x) = -1, for all x>0. If f(a) = -1 and f(ab) = -1 then b = ? Correct Answer 1 f(a)=-1f(ab)=-1then, ab=-1×1so f(b)=1

Explanation:

The charge of a room at Sheraton is 25% less than that of a room at Westin and 10% less than that of a room at Sonargaon . By what percent is the charge of a room at Westin is greater than that of Sonargaon ? Correct Answer 20% Let the charges at Sherato, Westin and Sonargaon be A, B & C respectively. Now,  A = B - 25% of B = B - 0.25B = 0.75B = 3B/4 or,  B = 4A/3 Again,  A = C - 10% of C = C - 0.1C = 0.9C = 9C/10 or, C = 10A/9 Now,  B - C =  4A/3 -  10A/9 = (12A - 10A) / 9 = 2A/9 Charge at westin is greater than charge at Sonargaon by (2A/9) / (10A/9) × 100% = 20%

Explanation:

A machine produces 1,000 units of plastic chair per hour . Working continuously at this rate, how many plastic chairs will this machine produce in a week ? Correct Answer 168,000 Total hours in a week = 7×24 = 168 hours Total production = 168×1000 = 168000 units

Explanation:

Topu earns TK. 5.00 for every hour he works. Last week he worked for x hours . He purchased y kg of rice. Price of per kg rice is TK. 12.00 . He saved the remaining amount . Which expression below shows his savings ? Correct Answer TK. (5.00x - 12.00y) Total income = 5x TK Total speding = 12y TK Savings = (5x - 12y) TK.

Explanation:

When a positive integer x is divided by a positive integer y the remainder is 9. If x = 96.12 then what is the value of y ? Correct Answer 75 According to the question,x = 96y + 0.12y = 96y + 12y/100 Again, ATQ 12y/100 = 9 3y/25 = 9 = > y = 75 (ans)