Explanation:

If a, b and c are 3 consecutive integers and a>b>c, Which of the follwoing has the maximum value? Correct Answer a+(b/c) As a is the greater number, adding a to any fraction of the given choice will have the maximum value. so, a + (b/c) has the maximum value.

Explanation:

Sam can mow a lawn in 20 min, while takes 10 min longer to mow the same lawn. How long will they take to mow the lawn if they work together? Correct Answer 12 min In 1 minute, Sam mows 1/20 of the lawn In 1 minute, Mark mows 1/(20 + 10) = 1/30 of the lawn (1/20 + 1/30) = 5/60 = 1/12 of the lawn takes 1 minute So, whole(1) lawn takes 12 minutes

Explanation:

If two planes leave the same airport at 1:00 pm, how many km apart will they at 3:00 one traverls directly at 150 km/h and the other travels directly west at 200 km/h? Correct Answer 500 km Difference of time = 3:00 pm 1:00 pm = 2 hrs First plane travels in 2 hrs = 2×150 = 300 km Second plane travels in 2 hrs = 2×200 = 400 km The directions of the planes forms a right angle triangle So, the direct distance = √(3002 + 4002) = √250000 = 500 km

Explanation:

A two digit number has 3 in its unit digit. The sum its digits is one seventh of the number itsself. What is the number? Correct Answer 63 Let, The number = 10x + 3 ATQ, 7(x + 3) = 10x + 3 ⇒7x + 21 = 10x + 3 ⇒21 - 3 = 10x 7x ⇒3x = 18 ⇒x = 6 The number = 10 × 6 + 3 = 63.

Explanation:

If an inspector rejects 0.8% of a product as defective, how many units of the produce? will he examined in order to rejected 2? Correct Answer 2500 0.08% product is rejected from = 100 So, 2 product is rejected from = (100 × 2 × 100)/8 = 2500

Explanation:

A wholesaler sells goods to a retiler at profilt of 20%. The retailer sells to the customs ,Who pays 80% more than the cost of the wholesaler . What is the relater's profit? Correct Answer 50% Let cost of wholesaler = 100tk At 20% profit he sells = 120tk = the cost of retailer Retailer sell it for 80% profit on cost of wholesaler = 100 + 100×(80/100) = 180 tk Profit of retailer = 180 - 120 = 60 tk Percentage = (60×100)/120 = 50%

Explanation:

A train went 300 km from City to city at an average speed of 100 km/h. At what speed did it travel on the way back if/his its average speed for the whole trip was 120 km/h Correct Answer 150 km/h Let, Way back speed = x ATQ, 2×x×100/(x + 100) = 120 Or, 200x/(x + 100) = 120 Or, 200x = 120x + 12000 Or, 80x = 12000 Or, x = 150

Explanation:

Of two groups of tourists, each has 60 people/. If threee fourth (i.e 75%) of the first group and two third of the second group board buses to travel to a museum. How many more people of the first group board buses than that of the second group? Correct Answer 5 ¾ of first group = ¾ of 60 = 45 2/3 of 2nd group = 2/3 of 60 = 40 Difference = 45 - 40 = 5

Explanation:

Six consecutive whole numbers are given. The sum of the first three numbers is 27 What is the sum of the last three numbers?3 Correct Answer 36 Let, Numbers are n, n + 1, n + 2 ATQ, n + n + 1 + n + 2 = 27 Or, 3n + 3 = 27 Or, 3n = 24 Or, n = 8 So, the numbers are - 8,9,10 Now, the last 3 consecutive numbers are 11,12,13 Sum of them 11 + 12 + 13 = 36

Explanation:

If an integer y is subtracted from an integer x, and the result is grater than x, then y must be. Correct Answer less than 0 ATQ, x - y>x Or, - y > 0 Or, y < 0

Explanation:

A 10% monthly salary increase resulted in a Tk. 9000 per year increase in salary for an employee. What was his monthly salary before the increase ? Correct Answer Tk. 7500 Yearly increase = 9000 tk Monthly increase = 9000/12 = 750 tk 10% of Salary is = 750 tk 100% of Salary is = (750×100)/10 = 7500 tk

Explanation:

A hammer and a screwdriver currently have the same price. If the price of a hammer rises by 6% and the price of a screwdriver goes up by 4%, how much more will it cost to buy 1 hammer and 1 screwdriver? Correct Answer 5% perquisite (noun): perk, fringe benefit, additional benefit, benefit, advantage, bonus.

Explanation:

Three individuals contributed Tk. 8000 each toward the purchase of a computer. If they bought the computer on sale for Tk. 19500 plus 10% sales tax, how much money should be refunded to each individual ? Correct Answer Tk. 850 Total contribution = 3 x 8000 = 24000 TK Cost of computer = 19500 + 10% of 19500 = 19500 + 1950 = 21450 TK. Excess contribution = 24000 - 21450 = 2550 TK. Refund to each = 2550/3 = 850 TK.

Explanation:

How much interest will Tk. 1000 earn in one year at an annual interest rate of 20% if interest rate is compounded every 6 months? Correct Answer 210 A = P ( 1 + r/2)2n and, C.I = A - P Where, P = principal R = rate in percent p.a.( per annum i.e. annually) n = number of years. Here, P = 1000, R = 20% and n = 1 year. Amount after 1 year = P ( 1 + r/2)2n = 1000 ( 1 + 0.20/2)2*1 = 1000 ( 1 + 0.1)2 = 1000 (1.1)2 = 1000 x 1.21 Amount = 1210 ∴Compounded Interest = A−P. C.I = 1210−1000 C.I = 210

Explanation:

If x and y are consecutive positive integers which of the following must be an even integer? Correct Answer xy As x and y are consecutive positive integers. Let , x = 1 and y = 2,    As we know that, odd × even = even so, xy = 1×2 = 2

Explanation:

Point A is 10 miles west of Point B. Point B is 30 miles North of Point C. Point C is 20 miles East of Point D. what is the distance between points A and D? Correct Answer 1010 AD2 = 302 + 102 AD2 = 900 + 100 AD = √1000 = 10√10

Explanation:

A mixture of 20 sprit and water contains 10% water. How much water must be added to this mixture to raise the percentage of water to 25% Correct Answer 4 Now water is 2 L and Spirit 18 L Let's add x L of water, so 1/4 = (2 + x)/(20 + x) x = 4 L

Explanation:

An article when sold at a gain of 5% yields Tk. 15 more than when sold at a loss of 5%. Its cost price would be__ Correct Answer Tk. 150 At, 5% gain, selling price = 105 Tk. Again, 5% loss, then selling price = 95tk Difference of both price = ( 105 - 95) tk = 10 tk Selling price 10 tk more than cost price = 100 tk selling price 15 tk more than cost price ( 100×15)/10 = 150 tk.